Canada
- Belfast, samfund afPrince Edward Island;
UK
- Belfast, hovedstad iNordirland
- Belfast Lough, et havindløb, overset af den nordirske hovedstad Belfast
Amerikas Forenede Stater
- Belfast, by i Maine;
- Belfast, by i New York-stat;
- Belfast, township of the Pennsylvania;
Sydafrika
- Belfast, by i provinsen Mpumalanga;
- Belfast, by i provinsen Limpopo.