Palm Beach County is a county in the southeastern part of Florida, located in the Miami metropolitan area. It is Florida's third-most populous county after Miami-Dade County and Broward County and the 26th-most populous in the United States, with 1,492,191 residents as of the 2020 census. Its county seat and largest city is West Palm Beach, which had a population of 117,415 as of 2020.