Tristan Alexander Emmanuel is a Canadian political and religious activist. He is the founder and former president of the Equipping Christians for the Public-square Centre (ECP Centre) and an outspoken opponent of same-sex marriage in Canada. He is now the president of Freedom Press Canada Inc., a niche publishing company that he founded in 2003.

Emmanuel was raised in Waterloo, Ontario as part of a nominally Lutheran family. After earning a Bachelor of Arts degree and attending divinity school in the United States, he was ordained as a minister in the Reformed Presbyterian Church General Assembly. He operated a small freight delivery company in Ontario's Niagara region in the 1990s, and served as the pastor of Living Hope Orthodox Presbyterian Church in Vineland. He later worked toward a Master's degree at McMaster University's Divinity School, writing about the efforts of early Christian apologists to lobby Roman Emperors.

In 1999, Emmanuel founded Equipping Christians for the Public-square. He remained its president for several years, before resigning in 2008.

Emmanuel was a candidate for the socially conservative Family Coalition Party in the Lincoln electoral division in the 1995 Ontario provincial election. He was quoted as saying, "It's time to have a principled party that understands there's a higher power than the government, a power we believe is God." Emmanuel argued that problems of unemployment and economic development could only be solved by a free-market system, and called for the government to shift welfare services to community organizations. He also opposed the Progressive Conservative Party's workfare proposal, which he described as "nothing more than slavery". He finished fourth against Progressive Conservative candidate Frank Sheehan.

Emmanuel ran against prominent federal politician Sheila Copps in a 1996 by-election as a candidate of the Christian Heritage Party of Canada. In this campaign, he called for harsher prison sentences and an increased focus on the rights of victims. He argued that Canada's Young Offenders Act should be abolished and corporal punishment reintroduced to schools, and was quoted as saying, "If an eleven-year-old murders someone, I think his life should be taken." He finished ninth in a field of thirteen candidates. Emmanuel also ran for the Christian Heritage Party in the 1997 federal election, and finished fifth against Liberal incumbent Walt Lastewka. Later, he described both the Family Coalition Party and the Christian Heritage Party as political dead ends.

Emmanuel became more involved with right-wing and socially conservative campaigns in the first decade of the twenty-first century. In April 2003, he organized a "Canadians for Bush" rally in Queenston Heights, Ontario, to support the American invasion of Iraq. The rally was attended by several prominent federal and provincial politicians, including Stockwell Day and provincial cabinet ministers Jim Flaherty and Tim Hudak.

Emmanuel's organizational role in the rally drew attention to controversial statements he had made in previous years. The New Democratic Party of Ontario (NDP) issued a press release with excerpts from several of Emmanuel's writings, asserting that he had described gay men as "sexual deviants" and Islam as "as far from peace, as hell is from heaven" in separate articles written in 2002. NDP legislator Rosario Marchese called on Hudak and Flaherty to disengage themselves from the rally in light of these statements. A spokesperson for Hudak responded that the minister had not known about Emmanuel's articles before seeing the press release, and that the pro-American rally should not be "sidetracked" over the matter.

As executive director of the ECP Centre, Emmanuel organized several public forums throughout 2003 to discuss same-sex marriage and the extension of Canada's hate speech laws to cover statements made against gays and lesbians. Most speakers at these events were social conservatives who opposed both legislative initiatives, although some speakers took different views.