Boynton Beach is a city in Palm Beach County, Florida, United States. It is situated about 57 miles north of Miami. The population was 68,217 at the 2010 census. In 2019, the city had an estimated population of 78,679 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 6,138,333 people at the 2020 census.