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