Boynton Beach is a city in Palm Beach County, Florida, United States. The population was 68,217 at the 2010 census. In 2017, the city had an estimated population of 73,992 according to the University of Florida, Bureau of Economic and Business Research. Boynton Beach is a principal city of the Miami metropolitan area, which was home to an estimated 6,012,331 people at the 2015 census