National Route 21 is a national highway in South Korea connects

Namwon Namwon (; ''Namwon-si'') is a city in North Jeolla Province, South Korea. Namwon is about 50 minutes from the provincial capital of Jeonju, which is almost three hours away from Seoul. The official city flower is Royal Azalea () while the city tr ...

Icheon Icheon () is a city in Gyeonggi Province, South Korea. Together with Yeoju, Icheon is known as a center of South Korean ceramic manufacturing and is a UNESCO City of Crafts and Folk Art. Other famous local products include peaches and rice. Loc ...

. It established on 31 August 1971.대통령령 제5771호 일반국도노선지정령
1971년 8월 31일 제정.

Main stopovers

Korean National route No 21 through Boryeong

North Jeolla Province North Jeolla Province (; ''Jeollabuk-do''), also known as Jeonbuk, is a province of South Korea. North Jeolla has a population of 1,869,711 (2015) and has a geographic area of 8,067 km2 (3,115 sq mi) located in the Honam region in the southwest ...

Sunchang County Sunchang County (''Sunchang-gun'') is a county in North Jeolla Province, South Korea. It is located in a mountainous region of the province and is connected to the city of Jeonju by a modern double-lane free-way that was completed in 2011. Suncha ...

Jeongeup Jeongeup (), also known as Jeongeup-si, is a city in North Jeolla Province, South Korea. The city limits include Naejang-san National Park, a popular destination particularly in autumn due to its foliage. Jeongeup is on the Honam Expressway and ...

Gimje Gimje () (''Gimje-si'') is a city in North Jeolla Province, South Korea. History The Gimje area is located on the "great plains" of Korea and has been cultivated since ancient times. Nations of early date ascended in the year 200. The Baekje Kingd ...

Jeonju Jeonju () is the 16th largest city in South Korea and the capital of North Jeolla Province. It is both urban and rural due to the closeness of Wanju County which almost entirely surrounds Jeonju (Wanju County has many residents who work in Jeonju) ...

Wanju County Wanju County (''Wanju-gun'') is a county in North Jeolla Province, South Korea. It almost entirely surrounds Jeonju. This county should not be confused with Wonju, in Gangwon-do. History ○ Mahan Baekje Kingdom Wansanju 16th year of King Gyeon ...

- Jeonju -

Iksan Iksan ( ko, 익산; ) is a city and major railway junction in North Jeolla Province, (commonly transliterated as Jeollabuk-do or Chollabuk-do) South Korea. The city center and railway junction was formerly called "Iri" (), but merged with Iksan C ...

- Gimje - Iksan -

Gunsan Gunsan (), also romanized as Kunsan, is a city in North Jeolla Province, South Korea. It is on the south bank of the Geum River just upstream from its exit into the Yellow Sea. It has emerged as a high-tech manufacturing industrial city and an int ...

South Chungcheong Province South Chungcheong Province ( ko, 충청남도, ''Chungcheongnam-do''), also known as Chungnam, is a province of South Korea. South Chungcheong has a population of 2,059,871 (2014) and has a geographic area of 8,204 km2 (3,168 sq mi) located in ...

Seocheon County Seocheon County () is a county in Chungcheongnam-do, South Korea. It is famous for its seafood and location near the mouth of the Geum River. Administrative divisions Seocheon county has two major centers, Janghang-eup and Seocheon-eup. Seocheon- ...

Boryeong Boryeong (), commonly known as Daecheon, is a Administrative divisions of South Korea, city in Chungcheongnam-do, South Chungcheong Province, South Korea. It is located on the coast of the Yellow Sea. It lies on the Janghang Line railroad, which c ...

Hongseong County Hongseong (''Hongseong-gun'') is a county in South Korea, and the capital of South Chungcheong Province. The current governor is Yeoung Lock Lee. The original name of the city is ''Hongju''. Symbols * The flag represents the Joyang Gate along wi ...

Yesan County Yesan () is a Administrative divisions of South Korea, county in South Chungcheong Province, South Korea. Famous people from Yesan include independence fighter Yoon Bong-Gil. Sudeoksa, a head temple of the Jogye Order of Korean Buddhism, is lo ...

Asan Asan () is a city in South Chungcheong Province, South Korea. It borders the Seoul Capital Area to the north. Asan has a population of approximately 300,000. Asan is known for its many hot springs and is a city of spas. Asan has grown into th ...

Cheonan Cheonan (; 천안시, ''Cheonan-si''), also spelled Ch'ŏnan, is a city in South Chungcheong, South Korea. Cheonan has a population of 666,417 (2018), making it the most-populous city or county in South Chungcheong, and the third most-populous ci ...

North Chungcheong Province North Chungcheong Province ( ko, 충청북도, ''Chungcheongbuk-do''), also known as Chungbuk, is a province of South Korea. North Chungcheong has a population of 1,578,934 (2014) and has a geographic area of located in the Hoseo region in the s ...

Jincheon County Jincheon County (''Jincheon-gun'') is a Administrative divisions of South Korea, county in Chungcheongbuk-do (North Chungcheong) Province, South Korea. Location Jincheon belongs to the middle of Chungcheongbuk-do. It borders several cities of its ...

Eumseong County Eumseong County (''Eumseong-gun'') is a county in North Chungcheong Province, South Korea, best known for being the birthplace of former UN Secretary-General Ban Ki-moon. Eumseong Clean Peppers Festival is held in Eumseong-gun, Chungbuk every ...

Gyeonggi Province Gyeonggi-do (, ) is the most populous province in South Korea. Its name, ''Gyeonggi'', means "京 (the capital) and 畿 (the surrounding area)". Thus, ''Gyeonggi-do'' can be translated as "Seoul and the surrounding areas of Seoul". Seoul, the na ...

Major intersections

* (■):

Motorway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...

IS: Intersection, IC: Interchange

North Jeolla Province North Jeolla Province (; ''Jeollabuk-do''), also known as Jeonbuk, is a province of South Korea. North Jeolla has a population of 1,869,711 (2015) and has a geographic area of 8,067 km2 (3,115 sq mi) located in the Honam region in the southwest ...

South Chungcheong Province South Chungcheong Province ( ko, 충청남도, ''Chungcheongnam-do''), also known as Chungnam, is a province of South Korea. South Chungcheong has a population of 2,059,871 (2014) and has a geographic area of 8,204 km2 (3,168 sq mi) located in ...

North Chungcheong Province North Chungcheong Province ( ko, 충청북도, ''Chungcheongbuk-do''), also known as Chungbuk, is a province of South Korea. North Chungcheong has a population of 1,578,934 (2014) and has a geographic area of located in the Hoseo region in the s ...

Gyeonggi Province Gyeonggi-do (, ) is the most populous province in South Korea. Its name, ''Gyeonggi'', means "京 (the capital) and 畿 (the surrounding area)". Thus, ''Gyeonggi-do'' can be translated as "Seoul and the surrounding areas of Seoul". Seoul, the na ...

References

{{National highways of South Korea 21 Roads in North Jeolla Roads in South Chungcheong Roads in North Chungcheong Roads in Gyeonggi