Joseph McNamara (June 18, 1888 – ) was an Ontario political figure. He represented Riverdale in the Legislative Assembly of Ontario from 1919 to 1923 as the only member of the Soldier Party and supported the United Farmers of Ontario-Independent Labour Party government of E.C. Drury that took office following the election. However, McNamara remained independent and, in 1921, made an alliance with M.M. MacBride, a dissenting member of the Independent Labour Party who had left the governing caucus, to move a Bill which would have introduced an eight-hour day. This was seen as an attempt to embarrass the rest of the ILP who opposed the measure in deference to the farmer base of the United Farmers who saw it as a threat to their ability to afford farm workers.