County Cavan County Cavan County Cavan () is a county in Ireland. It is in the province of Ulster and is part of the Border Region. It is named after the town of Cavan and is based on the historic Gaelic territory of East Breffny ("Bréifne"). Cavan County Council is the local authority for the county, which has a population of 76,092 according to the 2016 census. Cavan borders six counties: Leitrim to the west, Fermanagh and Monaghan to the north, Meath to the south-east, Longford to the south-west and Westmeath to the south. Cavan shares a border with County Fermanagh in
County Offaly Mountain which are the county's second and third highest peaks. Croghan Hill rises from the Bog of Allen and is located in northern Offaly. Although only 234 metres high, it is known for its view over the surrounding area and it stands out by itself. The floodplain of the River Shannon is in the north-western part of the county. The River Camcor runs through the town of Birr and is a Wild Trout Conservation Area. The River Brosna runs across the county from Lough Owel in Westmeath to Shannon Harbour. Silver River runs through several towns in the south of