When Luke Sawyer was born on 20 June 1760, in Templeton, Worcester, Massachusetts, United States, his father, Sylvanus Sawyer, was 26 and his mother, Susannah Geary, was 26. He married Rachel Greenleaf on 23 August 1784, in Wiscasset, Lincoln, Maine, United States. They were the parents of at least 4 sons and 4 daughters. He lived in Lincoln, Maine, United States in 1790. He registered for military service in 1831. He died on 8 April 1841, in Starks, Somerset, Maine, United States, at the age of 80, and was buried in Frederic Cemetery, Starks, Somerset, Maine, United States.