Hull is a town in Plymouth County, Massachusetts, United States, located on a peninsula at the southern edge of Boston Harbor. Its population was 10,293 at the 2010 census. Hull is the smallest town by land area in Plymouth County and the fourth smallest in the state. However, its population density is within the top thirty towns in the state.Hull has been the summer home to several luminaries throughout the years, including Calvin Coolidge and former Boston mayor John F. Fitzgerald, the father of Rose Kennedy and father-in-law of Joseph Kennedy, Sr..