William Steuart (1780 – February 12, 1839) was a stone mason in colonial Maryland, and Mayor of Baltimore from 1831 to 1832.

[4] He was brought up as a stonemason by his father and his uncle Hugh and became a Freemason, joining Concordia Lodge No.

[1] Steuart was Mayor of Baltimore for one term only, serving during the unexpired term of Mayor Jacob Small, who resigned his office on March 31, 1831 [2] Steuart was a building contractor and he prepared the stone work for the Washington Monument (Baltimore).

In addition he worked on the Court House erected in 1805 (since demolished), and other large buildings of the time.

[2] He also held a number of other civil offices in State and City government, in addition to being a member of the Vigilant Fire Company.