Bulgan may refer to:
- Bulgan Province, a province (aimag) of Mongolia
- Bulgan (city), the capital of Bulgan province
- Bulgan Airport, the airport of Bulgan city
- Bulgan Gol, a upstream river of Ulungur River
- several districts (sums) in different provinces:
- Bulgan, Arkhangai
- Bulgan, Bayan-Ölgii
- Bulgan, Dornod
- Bulgan, Khovd
- Erdenebulgan, Khövsgöl
- Bulgan, Ömnögovi
- Bulgan, Azerbaijan