Rentals in Union County, Florida, United States. Union County is a county located in the north central portion of the U.S. state of Florida, the smallest in the state. As of the 2010 census, the population was 15,535. The county seat is Lake Butler. With a personal per capita income of $20,396 (as of 2017), it is the fourth-poorest county in the United States.
VISIT OFFICIAL COUNTY SITE https://unioncounty-fl.gov