Alain is a surname, and may refer to

Alain Robert, French climber

Jehan Alain (1911-1940), French organist and composer

Alain Delon, French actor

Émile Chartier (1868-1951), French philosopher and antimilitarist

Alain Connes, French mathematician

Phil Alain (born 1968), Canadian painter

Rosa 'Alain', popular red floribunda rose variety

Al Ain International Airport in the United Arab Emirates

Alain is also widely used as a personal name and is the French form of Alan: