Boynton Beach is a city in Palm Beach County, Florida, United States. It is situated about 57 miles north of Miami. The 2020 census recorded a population of 80,380. Boynton Beach is located in the Miami metropolitan area of South Florida, which was home to 6,138,333 people at the 2020 census. The city is named after Nathan Boynton, a Civil War major and Michigan politician who became one of the first settlers in the area in 1895.