Cahersiveen[8][9] (Irish: Cathair Saidhbhín, meaning 'Little Sadhbh's stone ringfort'), sometimes Cahirciveen, is a town in the far south-west of Ireland, in County Kerry.

[citation needed] Cahersiveen was the site of the murder of five local men taken in the early hours of the morning from Bahaghs Workhouse where they were held prisoner, shot in the legs then blown up with a landmine on 12 March 1923 during the Civil War.

[14] Patrick O'Brian's novel Post Captain gives Cahersiveen as the location of the character Stephen Maturin's childhood home in Ireland.

[9] The decommissioned Royal Irish Constabulary barracks, dating to the 1870s and now a heritage centre, was built in the distinctive "Schloss" style favoured by its architect, Enoch Trevor Owen.

Because of this, it is often claimed to have been mistakenly built from the plans for a British barracks in India – a common myth heard in many Irish garrison towns.

Cahersiveen is the eighth Gaeltacht Service Town, on the 15th of June 2023 the Minister of State Patrick O'Donovan launched the "Cathair Saidhbhín Language Plan" alongside Kerry County Council.