The County of Brant (2016 population 36,707) is a single-tier municipality in the Canadian province of Ontario. Despite its name, it is no longer a county by definition, as all municipal services are handled by a single level of government. The county has service offices in Burford, Paris, Oakland, Onondaga and St. George.

It is a predominantly rural municipality in Southern Ontario. The largest population centre (2016 population, 12,310) is Paris. The County is bordered by North Dumfries township, the City of Hamilton, Haldimand County, Norfolk County, and the townships of Blandford-Blenheim and Norwich. The County abuts the provincially-mandated Greenbelt (Golden Horseshoe).

Although the city of Brantford appears geographically to be located in the County, it is a fully independent city with its own municipal government.  The Brant census division, which includes Brantford and the Six Nations and New Credit reserves, along with the County of Brant, had a population of 134,808 in the 2016 census.