Ayutthaya (also spelled Ayudhya or Ayuthia) may refer to:
- Ayutthaya Kingdom, a Thai kingdom that existed from 1350 to 1767
- Ayutthaya Historical Park, the ruins of the old capital city of the Ayutthaya Kingdom
- The following places which are situated in the area of the old capital city of the kingdom:
- Bank of Ayudhya, a Thai commercial bank
- HTMS Sri Ayudhya, a ship of the Royal Thai Navy
disambiguation page lists articles associated with the title Ayutthaya.
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