County established 4/6/1846, organized 7/13/1846, previously La Baca Judicial District in In 1842 the Republic of Texas Congress established a judicial county from portions of Fayette, Colorado, Jackson, Victoria, and Gonzales counties and named it La Baca County. 4/6/1846 the area was renamed La Vaca "The Cow" County, and it became a regularly constituted county 7/13/1846. La Vaca County eventually adopted the spelling Lavaca, and Hidesville eventually became Hallettsville. Petersburg and Hallettsville vied to be county seat, and after two hotly contested elections Hallettsville won the contest in 1852; only by force of arms, however, were the men of Hallettsville able to liberate the county records from Petersburg. -Handbook of Texas Online: Lavaca County, La Baca County