Palm Beach County is located in the southeastern part of the State of Florida and lies directly north of Broward County and Miami-Dade County. According to a 2019 census report, the county had a population of 1,496,770, making it the third-most populous county in the state of Florida and the 25th-most populous county in the United States. The largest city and county seat is West Palm Beach. Named after one of its oldest settlements, Palm Beach, the county was established in 1909, after being split from Dade County. The county's modern-day boundaries were established in 1963.