West Palm Beach, also known as West Palm, is the largest and most populous city in Palm Beach County, Florida, United States. The city is also the oldest incorporated municipality in South Florida. It is the county seat of Palm Beach County, and is one of the principal cities in the South Florida metropolitan area, which has an estimated 2007 population of 5,413,212. The area is known as the West Palm Beach-Boca Raton-Boynton Beach Metropolitan Division, which covers the entire Palm Beach County area. It is situated in the northernmost county of the South Florida metropolitan area.