Aichi Prefecture is a prefecture of Japan in the Chūbu region.

Aichi may also refer to:

• Aichi District, Aichi, district in Aichi Prefecture, Japan
• Aichi, Iran, a village in Kurdistan Province, Iran
• Aichi (surname)
• Aichi Sendou, protagonist of the media franchise Cardfight!! Vanguard
• Aichi Steel, Japanese steel manufacturing company
• Aichi University, university in Aichi Prefecture, Japan
• 5908 Aichi, main-belt asteroid
• Aiways (pinyin: Aìchí), a Chinese electric car manufacturer

• Aichi Kokuki, Japanese aircraft manufacturing company
• Aiti, a commune in France