Thomas J. Tolan (October 22, 1830 – January 31, 1883) was an American architect.He was born in Carrollton, Ohio to James and Elizabeth Crabbs Tolan. Like his father, he began working as a marble cutter in Delphos, Ohio. He married Harriett Todd Skinner on October 24, 1853.At some point in his life he made the jump from being a marble craftsman to an architect. In 1874, he moved his family and architectural practice to Fort Wayne, Indiana. The firm was known as T.J. Tolan & Son, Architects.