Brevard County is a county in the U.S. state of Florida. It is on the Atlantic coast of eastern Central Florida. As of the 2020 census, the population was 606,612, making it the 10th-most populated county in Florida. The official county seat is located in Titusville. A secondary center of county administration, including a circuit courthouse, was built in 1989 in the planned community of Viera, Florida, the geographic center of the county.