Thomas Killam (February 8, 1802 – December 15, 1868) was a Nova Scotia shipbuilder and political figure.

He was born in Yarmouth, Nova Scotia in 1802, the son of a shipbuilder there, and built his first ship, a schooner, in 1839.

He was elected to the General Assembly of Nova Scotia for Yarmouth County in 1847 as a Reformer and served on the public accounts committee as a member and later chairman.

In 1867, Killam was elected to the House of Commons; he supported the removal of Nova Scotia from the union and remain fixed in that opinion until his death in Digby in 1868.

His son Frank was elected to his father's seat in the House of Commons as a Liberal in an 1869 by-election.