Thomas Todhunter Shields (1873–1955) was the aggressive leader of the fundamentalist religious movement in Canada. A self educated immigrant from England, Shields was the longtime pastor of the Jarvis Street Baptist Church in Toronto.
Shields took action against McMaster University in Toronto for harboring a liberal theology professor. He was censured by the Baptists convention of Ontario and Québec in 1926, and was expelled in 1928. He took with him 70 churches and one college, and formed the Union of Regular Baptist Churches of Ontario and Quebec. It became affiliated with the Baptist Bible Union, based in the United States. His newspaper, The Gospel Witness, reached 30,000 subscribers in 16 countries, giving him an international reputation. He was one of the founders of the International Council of Christian Churches. Shields championed British imperialism against liberal Protestantism and Roman Catholicism.