Jefferson Bancroft (April 30, 1803 – January 3, 1890) was a farmer and politician who served as the sixth Mayor of Lowell, Massachusetts. Bancroft was born on April 30, 1803 in Warwick, Massachusetts. From 1831 to his death in 1890 Bancroft was a Deputy Sheriff of Middlesex County. Bancroft was a member of the Lowell City Council in 1839 and 1840, and a member of the Lowell Board of Aldermen from 1841 and 1842.