Walsh may refer to:

People and fictional characters

* Walsh (surname), including a list of people and fictional characters with the surname

Places

* Fort Walsh, one of the first posts of the Royal Canadian Mounted Police * Walsh, Ontario, Norfolk County, Ontario, Canada *

Walsh, Colorado Walsh is a Statutory Town in Baca County, Colorado, United States. The population was 546 at the 2010 census, down from 723 at the 2000 census. A post office called Walsh has been in operation since 1926. The community was named after one Mr ...

, USA * Walsh, Michigan, USA *

Walsh, Wisconsin Walsh is an unincorporated community located in the town of Porterfield, in Marinette County, Wisconsin, United States. Geography Walsh is located along County Trunk Highway G at the intersection with Bagley Road and Twin Creek Road,''Porterfiel ...

, USA * Walsh County, North Dakota, USA * Walsh, Alberta, a hamlet in Canada *

Walsh Lake (Lac-Jacques-Cartier) Lake Walsh is a fresh water body crossed to the west on by the discharge current from Fragasso Lake in Jacques-Cartier National Park. This lake is located entirely in the unorganized territory of Lac-Jacques-Cartier, Quebec, Lac-Jacques-Cartier, ...

, Canada * Mount Walsh National Park, Australia

Schools

* Walsh University, North Canton, Ohio * Walsh College, Troy, Michigan * Walsh School of Foreign Service, Washington, D.C. * Walsh Jesuit High School, Cuyahoga Falls, Ohio

Ships

* USS ''Walsh'' (APD-111), a United States Navy high-speed transport in commission from 1945 to 1946, originally intended to be a destroyer escort

Mathematics

* Walsh function, an orthogonal basis of the square-integrable functions on the unit interval * Walsh matrix, an orthogonal matrix with several useful properties * Walsh transform, a linear transform based on the Walsh matrix

Other