Buyeo can mean:
- Buyeo kingdom, a kingdom located in today's North Korea and southern Manchuria from around the 2nd century BC to 494 AD
- Buyeo County, a county in South Chungcheong Province, South Korea, and one-time capital of the ancient kingdom of Baekje
- Buyeo languages, a hypothetical language family which includes the languages of Baekje and Goguryeo, the Japonic languages, and possibly Korean as well
- Buyeo language, the language of the Buyeo kingdom