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