Canada
- Belfast, community ofPrince Edward Island;
UK
- Belfast, capital ofnorthern Ireland
- Belfast Lough, a marine inlet, overlooked by the Northern Irish capital Belfast
United States of America
- Belfast, city of Maine;
- Belfast, city of New York state;
- Belfast, township of the Pennsylvania;
South Africa
- Belfast, city in the province of Mpumalanga;
- Belfast, city in the province of Limpopo.