County Leitrim (Irish: Contae Liatroma) is a county in Ireland. It is located in the Border Region and is also part of the province of Connacht. It is named after the village of Leitrim. Leitrim County Council is the local authority for the county. The population of the county is 31,798 according to the 2011 census.
Leitrim is the 26th largest of the 32 counties by area and the smallest by population on the island. It is the smallest of Connacht’s 5 counties in both size and population. Leitrim is bordered by the counties of Donegal to the north, Fermanagh to the north-east, Cavan to the east, Longford to the south, Roscommon to the south-west and Sligo to the west. Fermanagh is in Northern Ireland while all the other neighbouring counties are within the Republic.