Union Springs is a city in and county seat of Bullock County, Alabama, United States. The population was 3,980 at the 2010 census. The ar…Union Springs is a city in and county seat of Bullock County, Alabama, United States. The population was 3,980 at the 2010 census. The area that became Union Springs was first settled by white men after the Creek Indian removal of the 1830s. Twenty-seven springs watered the land, giving rise to the name of Union Springs. The city was incorporated on January 13, 1844. Voters selected Union Springs as the county seat when Bullock County was formed in 1866.