County Wicklow ( ; ga, Contae Chill Mhantáin ) is a
county in
Ireland. The last of the traditional 32 counties, having been formed as late as
1606
Events
January–June
* January 24 – Gunpowder Plot: The trial of Guy Fawkes and other conspirators, for plotting against Parliament and James I of England, begins.
* January 29 – Pedro Fernandes de Queirós discovers the Pi ...
, it is part of the
Eastern and Midland Region and the
province of
Leinster. It is bordered by the
Irish Sea to the east and the counties of
Wexford to the south,
Carlow
Carlow ( ; ) is the county town of County Carlow, in the south-east of Ireland, from Dublin. At the 2016 census, it had a combined urban and rural population of 24,272.
The River Barrow flows through the town and forms the historic bounda ...
to the southwest,
Kildare to the west, and
South Dublin
, image_map = Island of Ireland location map South Dublin.svg
, map_caption = Inset showing South Dublin (darkest green in inset) within Dublin Region (lighter green)
, area_total_km2 ...
and
Dún Laoghaire–Rathdown
Dún Laoghaire–Rathdown ( ga, Dún Laoghaire–Ráth an Dúin) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is part of the Provinces of Ireland, province of Leinster and the Eastern and Midland Region. It is one of three s ...
to the north.
Wicklow is named after its
county town
In the United Kingdom and Ireland, a county town is the most important town or city in a county. It is usually the location of administrative or judicial functions within a county and the place where the county's members of Parliament are elect ...
of
Wicklow, which derives from the name (
Old Norse for "Vikings' Meadow").
Wicklow County Council is the
local authority for the county, which had a population of 155,258 at the
2022 census. Colloquially known as the "Garden of Ireland" for its scenerywhich includes extensive woodlands, nature trails, beaches, and ancient ruins while allowing for a multitude of walking, hiking, and climbing optionsit is the 17th largest of Ireland's 32 counties by area
and the 15th largest by population. It is also the fourth largest of Leinster's 12 counties by size and the fifth largest in terms of population.
History

County Wicklow was the last of the traditional counties of Ireland to be shired in
1606
Events
January–June
* January 24 – Gunpowder Plot: The trial of Guy Fawkes and other conspirators, for plotting against Parliament and James I of England, begins.
* January 29 – Pedro Fernandes de Queirós discovers the Pi ...
from land previously part of counties
Dublin and
Carlow
Carlow ( ; ) is the county town of County Carlow, in the south-east of Ireland, from Dublin. At the 2016 census, it had a combined urban and rural population of 24,272.
The River Barrow flows through the town and forms the historic bounda ...
. Established as a distinct county, it was aimed at controlling local groups such as the
O'Byrnes
The O'Byrne family ( ga, Ó Broin) is an Irish clann that descend from Bran mac Máelmórda, King of Leinster, of the Uí Faelain of the Uí Dúnlainge. Before the Norman invasion of Ireland they began to colonise south Wicklow.
There are many fa ...
. The ''
Military Road'', stretching from
Rathfarnham to
Aghavannagh
Aghavannagh () is a small village and townland in south County Wicklow, Ireland. It is located in the barony of Ballinacor South on the Military Road originally constructed between 1804 and 1809, in the wake of the 1798 rebellion. It is so remo ...
crosses the mountains, north to south, was built by government forces to assist them in defeating the rebels still active in the
Wicklow Mountains following the failed
Irish Rebellion of 1798.
[''See'' Philip Smith (writer), ''An Introduction to the Architectural Heritage of County Wicklow.'' Dublin: Wordwell Press / Government of Ireland, Department of the Environment, Heritage, and Local Government, National Inventory of Architectural Heritage, 2004.] It provided them with access to an area that had been a hotbed of Irish rebellion for centuries. Several barracks to house the soldiers were built along the route and the
Glencree Centre for Peace and Reconciliation
The Glencree Centre for Peace and Reconciliation is a non-governmental charitable organisation located in the Republic of Ireland. Its goal is to promote peace and reconciliation within and between communities through facilitated dialogue and ...
was built alongside the remains of barracks there. Battalions of the
Irish Army use firing ranges in County Wicklow for tactical exercises, especially the largest one in the
Glen of Imaal which was previously used by the
British Army prior to independence.
The ancient
monastery of
Glendalough is located in County Wicklow. During the
Cromwellian conquest of Ireland
The Cromwellian conquest of Ireland or Cromwellian war in Ireland (1649–1653) was the re-conquest of Ireland by the forces of the English Parliament, led by Oliver Cromwell, during the Wars of the Three Kingdoms. Cromwell invaded Ireland wi ...
, local authorities immediately surrendered without a fight. During the Irish Rebellion of 1798, some of
United Irishmen insurgents took refuge in the Wicklow Mountains, resulting in clashes between British forces and rebels commanded by
Joseph Holt near Aughrim and later at Arklow.
The boundaries of the county were extended in 1957 by the Local Government Act which "detached lands from the
County of Dublin and from the jurisdiction and powers of the Council of the County of Dublin" near Bray and added them to the County of Wicklow.
Geography
Location
Wicklow is part of the
Eastern and Midland Region of Ireland, within the province of
Leinster. It is bounded by four counties,
Dublin to the north;
Kildare and
Carlow
Carlow ( ; ) is the county town of County Carlow, in the south-east of Ireland, from Dublin. At the 2016 census, it had a combined urban and rural population of 24,272.
The River Barrow flows through the town and forms the historic bounda ...
to the west;
Wexford to the south; and the
Irish sea to the east. Wicklow is the 17th largest of Ireland's 32 traditional counties by land area, and the 16th most populous. It is the fourth largest of Leinster's 12 counties by size and the fifth most populous. The county is named after the town of
Wicklow, located approximately south of
Dublin, the capital city of Ireland.

The
Wicklow Mountains are Ireland's largest continuous upland area and occupy a significant portion of the county, spanning the entire centre of Wicklow and stretching into Dublin and Wexford at their southern and northern fringes.
Lugnaquilla, at above sea level, is the tallest peak in the range, the highest mountain in Ireland outside of
County Kerry
County Kerry ( gle, Contae Chiarraí) is a county in Ireland. It is located in the South-West Region and forms part of the province of Munster. It is named after the Ciarraige who lived in part of the present county. The population of the co ...
, and Ireland's 13th-highest mountain overall.
The
Wicklow Mountains National Park, located in the middle of the county, is a dedicated protected area covering , making it the largest
national park
A national park is a nature park, natural park in use for conservation (ethic), conservation purposes, created and protected by national governments. Often it is a reserve of natural, semi-natural, or developed land that a sovereign state dec ...
in Ireland. The
Wicklow Way was the first
long-distance trail
A long-distance trail (or long-distance footpath, track, way, greenway) is a longer recreational trail mainly through rural areas used for hiking, backpacking, cycling, horse riding or cross-country skiing. They exist on all continents excep ...
in the State, and crosses the range for .
Geology

The Wicklow Mountains are centred on the Leinster
batholith
A batholith () is a large mass of intrusive igneous rock (also called plutonic rock), larger than in area, that forms from cooled magma deep in Earth's crust. Batholiths are almost always made mostly of felsic or intermediate rock types, such ...
and are primarily composed of
granite surrounded by an envelope of
mica
Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates. This characteristic is described as perfect basal cleavage. Mica is ...
-
schist and much older rocks such as
quartzite. Covering , the Leinster batholith is the most expansive mass of
intrusive igneous rock in Ireland or
Britain. The oldest rocks in the county are the quartzites of the Bray Group that include
Bray Head and the
Little Sugar Loaf
Little Sugar Loaf () is a hill in the far northeastern sector of the Wicklow Mountains in Ireland. It does not have the elevation to rank on Arderin, Hewitt, or Vandeleur-Lynam scales,Mountainviews, (September 2013), "A Guide to Ireland's ...
and
Great Sugar Loaf mountains. These
metamorphosed from
sandstone deposited in the deep waters of the primeval
Iapetus Ocean
The Iapetus Ocean (; ) was an ocean that existed in the late Neoproterozoic and early Paleozoic eras of the geologic timescale (between 600 and 400 million years ago). The Iapetus Ocean was situated in the southern hemisphere, between the paleoco ...
during the
Cambrian
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...
period (542-488 million years ago).
As with much of Ireland, Wicklow's terrain was sculpted by successive periods of glaciation during the
quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ...
. Weathering and erosion by ice carved out long valleys known as
glens
A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by steep slopes. Whittow defines it as a "Scottish term for a deep valley in the Highlands" that is "narrower ...
(from the
Irish ''gleann'') such as
Glenmacnass,
Glen of the Downs
A glen is a valley, typically one that is long and bounded by gently sloped concave sides, unlike a ravine, which is deep and bounded by steep slopes. Whittow defines it as a "Scottish term for a deep valley in the Highlands" that is "narrowe ...
,
Glenmalure,
Glen of Imaal,
Glencree and
Glendalough. The Irish Sea Ice-Sheet began to retreat shortly after the
Last Glacial Maximum
The Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets were at their greatest extent.
Ice sheets covered much of Northern North America, Northern Eur ...
ca. 20,000-23,000 years ago but significant ice masses persisted in the Wicklow Mountains for another 4,000-7,000 years.
Hydrology

Major rivers include the
River Liffey, Ireland's 8th-longest river, which rises near
Tonduff mountain and flows through the centre of
Dublin City, reaching the Irish Sea at
Dublin Bay.
Its biggest tributary by volume, the
River Dodder, rises along the northern slope of
Kippure in the far north of the county, while the Kings River joins at Blessington Lakes. Multiple other Liffey tributaries flow within the county.
The
River Slaney, which starts at Lugnaquilla, flows west and then south before reaching
St George's Channel
St George's Channel ( cy, Sianel San Siôr, ga, Muir Bhreatan) is a sea channel connecting the Irish Sea to the north and the Celtic Sea to the southwest.
Historically, the name "St George's Channel" was used interchangeably with "Irish Sea" ...
at
Wexford town. The
Avonmore and
Avonbeg rivers join to form the
Avoca River at the ''Meeting of the Waters'' in the Vale of Avoca.
The
River Derreen
The River Derreen () is a large river in the southeast of Ireland. It rises on central Lugnaquilla Mountain in the western Wicklow Mountains and flows south from Lugnaquilla Mountain and then southwest to join the River Slaney south of Tullo ...
in the south of the county defines a section of the border with Carlow.

Most of the county's lakes (or loughs) are glacially derived
ribbon
A ribbon or riband is a thin band of material, typically cloth but also plastic or sometimes metal, used primarily as decorative binding and tying. Cloth ribbons are made of natural materials such as silk, cotton, and jute and of synthetic mater ...
and
corrie lakes found in scenic
trough valleys surrounded by mountains, making them popular with tourists. Notable lakes in the county include
Glendalough Upper Lake,
Lough Tay ('The
Guinness
Guinness () is an Irish dry stout that originated in the brewery of Arthur Guinness at St. James's Gate, Dublin, Ireland, in 1759. It is one of the most successful alcohol brands worldwide, brewed in almost 50 countries, and available in ove ...
Lake'),
Lough Ouler ('The Heart-shaped Lake'), Lough Bray,
Lough Dan and Lough Nahanagan.
Poulaphouca Reservoir is the largest of Wicklow's lakes, covering in the west of the county. It is the largest artificial lake in Ireland and was created following the damming of the
River Liffey at
Poulaphouca in 1940. The village of Ballinahown was completed submerged by the reservoir and its 70 families were relocated. Ruins of the old village including buildings, fences and farm machinery can be seen during droughts when water levels in the reservoir diminish. The lower
Vartry Reservoir, constructed between 1862 and 1868, is the county's second largest lake.
Coast

Wicklow has a relatively
short coastline, at in length. Wicklow's coastline is mostly straight, with few sizable bays or inlets and no offshore islands, giving it a shorter coastline than smaller counties like
Louth and Dublin.
Wicklow Head is the county's most prominent coastal headland, and is also the most easterly mainland point of the Republic of Ireland. Wicklow's east coast is a popular domestic summer holiday destination, and the county has numerous beaches including
Brittas Bay, Clogga Beach, The Cove, Silver Strand Beach, Sallymount Bay Beach, Ennereilly Beach, Newcastle Beach, Arklow North and South Beaches, Greystones North and South Beaches, Bray Beach, Magheramore Beach and Porter's Rock Beach.
Forest
The county has roughly of wooded area, the 8th highest total forest cover in Ireland. In terms of forest cover as a proportion of land area, Wicklow ranks second in the country, at 17.9%. Known as the "Garden of Ireland", Wicklow was historically the county with the highest percentage of woodlands. The 2017 National Forestry Inventory revealed that
County Leitrim had overtaken it for the first time. Wicklow is in a
temperate broadleaf and mixed forests biome, although the majority of Wicklow's forests are commercial
conifer
Conifers are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single ...
s. The economic
tree line in the region is around , above which
hill farming and
blanket bog dominates.
Urban development
In terms of urban development,
Wicklow County Council imposes the most stringent planning restrictions in Ireland. In order to build a house outside of the main towns, a person must be "born and bred in the area, or have lived there for a period of 10 years" and must also demonstrate that the house is for their own housing needs, rather than for resale. Further, potential buyers in rural areas must be approved by the council before the homeowner is allowed to sell to them. The primary justification for these restrictions is to avoid
one-off housing or other poorly planned developments which could put a strain on the county's infrastructure and degrade its natural environment.
Climate

The climate of Wicklow is
temperate oceanic (
Köppen climate classification ''Cfb'' in most areas, and ''Cfc''
oceanic subpolar in some highland areas), with cool, humid summers, and mild, wet winters. The climate of the eastern portion of the county is moderated by the
Irish sea and averages milder winters and cooler summers, while the western inland portion along the
Kildare border experiences warmer summers and colder winters. The county's upland interior experiences significantly lower temperatures and higher rainfall year-round.
Snow typically falls from December to March, but most low-lying and coastal areas see only a few days of lying snow per year, or may see no snow at all during some winters. The Wicklow Mountains region is the snowiest part of Ireland and can experience 50 or more days of snowfall each year.

The county experiences a narrow annual temperature range. Typical daytime highs range from throughout the county in July and August, with overnight lows in the range, although temperatures in the mountains can be lower.
Mean January temperatures range from on the coast to at high elevations. Precipitation is fairly evenly distributed throughout the year, although the wettest months (October and November) receive roughly twice as much rain as the driest months (February, March and April). The driest area of Wicklow is the northeast corner of the county, which is protected from the prevailing south-westerly winds by the Wicklow Mountains and receives around of rainfall per year. The coastal region of
County Dublin immediately to the north is the driest location in all of Ireland as a result of the
rain shadow
A rain shadow is an area of significantly reduced rainfall behind a mountainous region, on the side facing away from prevailing winds, known as its leeward side.
Evaporated moisture from water bodies (such as oceans and large lakes) is carrie ...
created by the mountains.
Easterly winds can occur between February and May, and are often associated with extreme snowfall events such as the 2018 "
Beast from the East
''Beast from the East'' is a live album recorded by the American heavy metal band Dokken in Japan in April 1988, during tour in support of their album ''Back for the Attack''. It was released on November 16, 1988. The album features live versi ...
" and the "
Big Snow of 1947". Much of Wicklow is very vulnerable to heavy snowfall and the county is typically the hardest hit by such events, with some areas recording over of snow. During the winter of 1947, residents of
Rathdrum called upon the
Irish Red Cross
The Irish Red Cross Society (IRCS; also Irish Red Cross or IRC; ga, Crois Dhearg na hÉireann) is the National Red Cross Society for the Republic of Ireland. (Northern Ireland comes under the aegis of the British Red Cross.) The society was f ...
to drop them food parcels by plane as the village had been inaccessible by road for over a month due to heavy snow.
Wicklow is occasionally affected by
hurricanes, although they are usually
extratropical storms by the time they reach Ireland. On 24 August 1986, during
Hurricane Charley
Hurricane Charley was the first of four separate hurricanes to impact or strike Florida during 2004, along with Hurricane Frances, Frances, Hurricane Ivan, Ivan and Hurricane Jeanne, Jeanne, as well as one of the strongest hurricanes ever to ...
, of rain fell over a 24-hour period at
Kippure on the Wicklow-Dublin border, the greatest daily rainfall total ever recorded in Ireland. The hurricane caused severe flooding and up to 1,000 homes had to be evacuated in Bray alone. Other major floods in Wicklow which resulted in loss of life occurred in 1886–87, 1931, 1965 and 2011.
Subdivisions
Baronies
There are eight historic
baronies Barony may refer to:
* Barony, the peerage, office of, or territory held by a baron
* Barony, the title and land held in fealty by a feudal baron
* Barony (county division), a type of administrative or geographical division in parts of the British ...
in the county. While baronies continue to be officially defined units, they are no longer used for administrative purposes. Their official status is illustrated by Placenames Orders made since 2003, where official Irish names of baronies are listed under "Administrative units". The largest barony in Wicklow is Lower Talbotstown, at , and the smallest barony is Rathdown, at .
*
Arklow (''An tInbhear Mór'')
*
Ballinacor North
Ballinacor North () is a barony in County Wicklow, Ireland.
Etymology
Ballinacor North derives its name from the Ballinacor Castle - from Irish ''Baile na Corra'', town of the weir.
Location
Ballinacor North is located in central County Wickl ...
(''Baile na Corra Thuaidh'')
*
Ballinacor South
Ballinacor South () is a barony in County Wicklow, Ireland. This geographical unit of land is one of eight baronies in County Wicklow. It is located in the southern Wicklow Mountains. Its chief town is Aughrim. The barony lies between Ballinac ...
(''Baile na Corra Theas'')
*
Newcastle (''An Caisleán Nua'')
*
Rathdown (''Ráth an Dúin'')
*
Shillelagh (''Síol Éalaigh'')
*
Lower Talbotstown
Lower Talbotstown () is a barony in County Wicklow, Ireland.
Etymology
Lower Talbotstown derives its name from Talbotstown townland, in Kilbride.
Location
Lower Talbotstown is located in northwest County Wicklow.
History
Lower Talbotstown: ...
(''Baile an Talbóidigh Íochtarach'')
*
Upper Talbotstown
Upper Talbotstown () is a barony in County Wicklow, Republic of Ireland.
Etymology
Upper Talbotstown derives its name from Talbotstown village, near Kilbride.
Location
Upper Talbotstown is located in west County Wicklow, covering much of th ...
(''Baile an Talbóidigh Uachtarach'')
Townlands
Towns and villages
*
Aghavannagh
Aghavannagh () is a small village and townland in south County Wicklow, Ireland. It is located in the barony of Ballinacor South on the Military Road originally constructed between 1804 and 1809, in the wake of the 1798 rebellion. It is so remo ...
*
Annacurra
*
Annamoe
*
Arklow
*
Ashford Ashford may refer to:
Places
Australia
*Ashford, New South Wales
*Ashford, South Australia
*Electoral district of Ashford, South Australia
Ireland
*Ashford, County Wicklow
*Ashford Castle, County Galway
United Kingdom
* Ashford, Kent, a town
** ...
*
Aughrim
*
Avoca
*
Ballinaclash
Ballinaclash (A. D. Mills, 2003, ''A Dictionary of British Place-Names'', Oxford University Press) is a village in east County Wicklow centred on a bridge that carries the R753 regional road across the River Avonbeg.
The village is mentione ...
*
Ballinakil
Ballinakil () is a small, sparsely populated townland, located in County Wicklow
County Wicklow ( ; ga, Contae Chill Mhantáin ) is a county in Ireland. The last of the traditional 32 counties, having been formed as late as 1606, it is pa ...
*
Baltinglass
Baltinglass, historically known as Baltinglas (), is a town in south-west County Wicklow, Ireland. It is located on the River Slaney near the border with County Carlow and County Kildare, on the N81 road.
Etymology
The town's Irish name, ''Bea ...
*
Blessington
*
Bray
*
Brittas Bay
*
Carnew
*
Coolafancy
Coolafancy () is a townland and village in County Wicklow in Ireland. The area of Coolafancy is o