Baca County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 3,506. The county seat is Springfield. Located at the southeast corner of Colorado, the county shares state borders with Kansas, New Mexico, and Oklahoma.

Springfield is a Statutory Town which is also the county seat and most populous town in Baca County, Colorado, United States. The population was 1,325 at the 2020 census.