Yair (Hebrew: יאיר) is a Hebrew given name. Jair is a variant. It may also be used as a surname. It may refer to:
- Eleazar ben Yair, Jewish commander of the forces of Israel at Masada, (died in Siege of Masada, 74CE)
- Jair or Yair, the father of Mordecai
- Yair Bacharach (1639—1702) – Rabbi in Germany
- Yair Davidovitz (born 1945), Israeli Olympic sport shooter
- Yair Golan (born 1962), Israeli politician and former general in the Israel Defense Forces
- Yair González (born 2002), Argentine footballer
- Yair Kless (born 1940), Israeli violinist and professor
- Yair Lapid (born 1963), Israeli politician, former Prime Minister of Israel
- Yair Lotan (born 1973), actor
- Yair Michaeli (born 1944), Israeli Olympic competitive sailor
- Yair Netanyahu (born 1991), son of the current Israeli prime minister Benjamin Netanyahu
- Yair Nossovsky (born 1937), Israeli footballer
- Yair Pantilat (born 1939), Israeli Olympic runner
- Yair Rodriguez (born 1992), Mexican mixed martial artist
- Yair Rosenblum (1944–1996), Israeli composer
- Yair Sprinzak (1911–1999) – Israeli scientist and Member of Knesset
- Yair Tauman (born 1948), Israeli professor and businessman
- Yair Tzaban (born 1930), Israeli politician
- Yair Wertheimer (born 1955), Israeli tennis player