Thomas C. Harden (c.1856 – May 1925) was an American businessman and politician from New York.

He owned with his brothers a trucking company in Brooklyn.

On December 21, 1909, Harden was elected to the New York State Senate to fill the vacancy caused by the death of Patrick H. McCarren, and was a member of the State Senate (7th D.) from 1910 to 1912, sitting in the 133rd, 134th and 135th New York State Legislatures.

• Official New York from Cleveland to Hughes by Charles Elliott Fitch (Hurd Publishing Co., New York and Buffalo, 1911, Vol. IV; pg. 367)
• MICHAEL GEORGE HARDEN... died (death notice of his brother), in NYT on April 10, 1917
• HARDEN IN McCARREN'S SEAT in NYT on December 22, 1909
• THOMAS C. HARDEN DEAD; Ex-State Senator Dies in His 70th Year in NYT on May 17, 1925 (subscription required)