Arthur Hill Gillmor (March 12, 1824 – April 13, 1903) was a Canadian farmer, lumberman and Liberal politician from New Brunswick. He was the son of Daniel and Purmelia Gillmor, both native of New Brunswick. He was educated at the , St. Andrews and later engaged in the local lumber and farming business. Mr. Gillmor married Hannah Dawes Howe, of Maine, in January 1846. They had four children: Daniel, Henry, Percy and Delia. His son Daniel also served in the Senate from 1907 to 1918.