Wentworth County, area , is a historic county in the Canadian province of Ontario. It was created in 1816 as part of the Gore District (1816-1849) in what was then Upper Canada and later Canada West (1841-1867). It was named in honour of Sir John Wentworth, the last royal governor of colonial New Hampshire, lieutenant-governor of Nova Scotia (1792 to 1808) and an intimate friend of William Jarvis, the first provincial secretary of Upper Canada. The county originally consisted of seven townships that formerly belonged to Haldimand, Lincoln and York Counties. Between 1850 and 1854, Wentworth County and Halton County were briefly joined for government purposes as the United Counties of Wentworth and Halton although for administrative purposes, they remained distinct. In 1973, Wentworth County was replaced by the Regional Municipality of Hamilton-Wentworth. In 2001, the Regional Municipality and its six constituent municipalities were amalgamated as the "megacity" of Hamilton. Constituent townships Each township that was ever part of the county is listed alphabetically below along with its years of existence, and its previous and subsequent configurations. Ancaster, area , (surveyed 1798), 1816–1973, later became a village then town and part of township to Town of Dundas Barton, area . The township was surveyed 1792 and named after the English town. The township included Hamilton and existed from 1816 to 1973, later became Village and City of Hamilton Beverley, area . Surveyed and opened for settlement in 1798. The five northern concessions were surveyed in 1794 and the southern part in 1797. The Township was named from the town in the East Riding of Yorkshire. Community centres were: Copetown, Lynden, Rockton and Westover. The Township existed from 1851 to 1973, later divided with one part to North Dumfries, Ontario and majority to Town of Flamborough Binbrook (surveyed 1798), existed from 1816 to 1973, later one half of Glanbrook Township Caistor, existed from 1845 to 1851, earlier and later part of Haldimand County, then Lincoln County and, since 1970, the Township of West Lincoln in the Regional Municipality of Niagara Flamborough East, area . Both East and West Flamborough were surveyed and opened for settlement in 1792. The Township existed from 1851 to 1973, later divided with one part to City of Burlington and majority to Town of Flamborough Flamborough West, area Both East and West Flamborough were surveyed and opened for settlement in 1792. The Township existed from 1851 to