Kings County or King's County may refer to:
Places
Canada
Kings County, New Brunswick
Kings County, Nova Scotia
Kings County, Prince Edward Island
King's County (electoral district), abolished in 1892
Ireland
County Offaly, formerly called King's County
King's County (Parliament of Ireland constituency)
King's County (UK Parliament constituency)
United States
Kings County, California
Kings County, New York, coextensive with Brooklyn
Washington County, Rhode Island, called King's County until 1781
Ships
Kings County (barque), a large sailing vessel named after Kings County, Nova Scotia