Jair (alternatively spelt Jahir) is a masculine given name. It is derived from Hebrew יָאִיר (Yair), which means "he illuminates". It may refer to the following people:
Jair (biblical figure) of Manasseh, biblical leader and homesteader
Jair Bala (1943–2022), Brazilian footballer and manager
Jair Baylón (born 1989), Peruvian footballer
Jair Benítez (born 1979), Colombian footballer
Jair Bernal (born 1968), Colombian road cyclist
Jair Bolsonaro (born 1955), 38th president of Brazil
Jair Braga (born 1954), Brazilian cyclist
Jair Céspedes (born 1984), Peruvian footballer
Jair Córdova (born 1996), Peruvian footballer
Jair da Costa (1940–2025), Brazilian footballer
Jair Eduardo Britto da Silva (born 1988), Brazilian footballer
Jair García (born 1978), Mexican footballer
Jair Macías (born 2009), Mexican footballer
Jair Gonçalves Prates (born 1953), Brazilian footballer
Jair Jurrjens (born 1986), Curaçaoan baseball pitcher
Jaïr Karam, French football player and manager
Jair Lynch (born 1971), American gymnast
Jair Marinho de Oliveira (born 1936), Brazilian footballer
Jair Marrufo (born 1977), American association football referee
Jair Nunes (born 1994), Santomean football player
Jair Oliveira (born 1975), Brazilian composer, singer and producer
Jair Pereira (born 1986), Portuguese-Mexican footballer
Jair Pereira (football manager) (born 1946), Brazilian football manager and former player
Jair Picerni (born 1944), Brazilian football manager and former player
Jair Rosa (born 1975), Uruguayan footballer
Jair da Rosa Pinto (1921–2005), Brazilian footballer
Jair Reinoso (born 1985), Colombian footballer
Jair Rodrigues (1939–2014), Brazilian musician and singer
Jair Tavares da Silva (born 1994), Brazilian footballer
Jair Ventura Filho (born 1944), also known as Jairzinho, Brazilian footballer
Jair Yglesias (born 1981), Peruvian footballer