The Big City Mayors' Caucus (BCMC) is a coalition of mayors from Canada's largest cities who work together to advocate on issues affecting major urban centres. The caucus provides a collective voice on federal policy matters, presenting unified positions on infrastructure funding, housing, transit, immigration, and other priorities. By speaking together, big city mayors amplify their influence with the federal government beyond what individual cities could achieve alone. The caucus meets regularly and issues joint statements and policy recommendations. This collaboration reflects recognition that Canada's largest cities share common challenges distinct from smaller municipalities.