Map - County Wicklow (Wicklow)

County Wicklow (Contae Chill Mhantáin ) is a county in Ireland. The last of the traditional 32 counties, having been formed as late as 1606, 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 to the southwest, Kildare to the west, and South Dublin and Dún Laoghaire–Rathdown to the north.

Wicklow is named after its county town of Wicklow, which derives from the name Víkingaló (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.

County Wicklow was the last of the traditional counties of Ireland to be shired in 1606 from land previously part of counties Dublin and Carlow. Established as a distinct county, it was aimed at controlling local groups such as the O'Byrnes. The Military Road, stretching from Rathfarnham to Aghavannagh 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. 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 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, 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.