Horace Augustus Hildreth (December 2, 1902 – June 2, 1988) was born in Gardiner, Maine, the son of an attorney. Hildreth attended local schools before graduating from Bowdoin College in the class of 1925 and receiving his LL.B. from Harvard University in 1928. In Boston he joined the prestigious law firm of Ropes, Gray, Best, Coolidge and Rugg before returning to Maine with the desire for a political career. Elected to the Maine House of Representatives in 1940 and the Maine Senate in 1942, he served as 109th President of the Maine Senate for the 1943–1944 term.