Union County is a county located in the north central portion of the U.S. state of Florida, the smallest in the state by area. As of the 2020 census, the population was 16,147. The county seat is Lake Butler. With a personal per capita income of $18,396, it is the poorest county in the United States.

Bradford County is a county in the North central Region of the U.S. state of Florida. As of the 2020 census, the population was 28,303. Its county seat and largest city is Starke.