When Joseph Blodgett III was born on 19 May 1745, in Brimfield, Hampden, Massachusetts, United States, his father, Joseph Blodget, was 24 and his mother, Hannah Haynes, was 22. He married Lucy Munger on 10 November 1768, in Wales, Hampden, Massachusetts, United States. They were the parents of at least 5 sons and 3 daughters. He died on 4 March 1819, in Hudson, Hillsborough, New Hampshire, United States, at the age of 73, and was buried in Hudson, Hillsborough, New Hampshire, United States.