Boca Raton ( rə-TOHN), often referred to as simply Boca, is the southernmost city in Palm Beach County, Florida, United States. It was first incorporated on August 2, 1924 as "Bocaratone," and then incorporated as "Boca Raton" in 1925. It is one of the wealthiest communities in South Florida. The 2018 population estimated by the U.S. Census Bureau was 99,244. However, approximately 200,000 people with a Boca Raton postal address live outside its municipal boundaries, in newer developments such as West Boca Raton. As a business center, the city experiences significant daytime population increases. Boca Raton is 43 miles (69 km) north of Miami and is a principal city of the Miami metropolitan area, which had a population of 6,012,331 people as of 2015.