Coolidge Senior engaged in many occupations and developed a statewide reputation as a prosperous farmer, storekeeper, and public servant. He held various local offices, including justice of the peace and tax collector and served in the Vermont House of Representatives as well as the Vermont Senate. Coolidge's mother was the daughter of Hiram Dunlap Moor, a Plymouth Notch farmer and Abigail Franklin. She was chronically ill and died at the age of 39, perhaps from tuberculosis, when Coolidge was twelve years old. His younger sister, Abigail Grace Coolidge (1875–1890), died at the age of 15, probably of appendicitis, when Coolidge was 18. Coolidge's father married a Plymouth schoolteacher in 1891, and lived to the age of 80.