Marcus A. Coolidge (1865–1947) was a U.S. Senator from Massachusetts from 1931 to 1937. Senator Coolidge may also refer to:
Arthur W. Coolidge (1881–1952), Massachusetts State Senate Calvin Coolidge (1872–1933), Massachusetts State Senate Carlos Coolidge (1792–1866), Vermont State Senate Horace H. Coolidge (1832–1912), Massachusetts State Senate John Calvin Coolidge Sr. (1845–1926), Vermont State Senate