Theodore Loomis Minier (December 16, 1819 Ulster Township, Pennsylvania – August 27, 1895 Elmira, New York) was an American politician from New York.
He attended the common schools and Athens Academy.
In 1838, he removed to Horseheads, in Chemung County, New York.
On May 25, 1848, Minier married Sarah Vail Maxwell, and they had three children.
After the death of Charles Cook in 1866, Minier took charge of the bank's operations.