Thomas Millidge (ca 1735 – September 8, 1816) was a surveyor, judge and political figure in Nova Scotia. He represented Digby Township from 1785 to 1793 and Annapolis County from 1793 to 1806 in the Nova Scotia Legislative Assembly.
He was born in Hanover Township, New Jersey, the son of John Millidge. In 1758, he married Mercy Berker. He was named deputy surveyor for Morris, Sussex, Bergen, and Essex counties in 1765. In 1775, he was named justice of the peace for Morris County. He joined the British army at the end of 1776, becoming a major in the New Jersey Volunteers. His property in New Jersey was seized and sold at auction; he was later paid some compensation for his losses. At the end of the American Revolutionary War, he was granted land in the Annapolis Valley area in Nova Scotia. He settled first at Digby and then at Granville, Nova Scotia. In 1806, Millidge was defeated in a bid for reelection to represent Granville Township in the provincial assembly. He also served as a justice of the peace, judge in the Inferior Court of Common Pleas and colonel in the local militia. Millidge died in Granville.
His son Thomas served in the Legislative Assembly of New Brunswick.