A Chamberlain is an officer in charge of managing the household of a sovereign.

See:

• Lord Chamberlain
• Camerlengo

Chamberlain is also the surname of a number of noted individuals:

• Austen Chamberlain
• Joseph Chamberlain
• Joshua Chamberlain
• Neville Chamberlain
• Wilt Chamberlain
• Houston Stewart Chamberlain

A Chamberlin is a musical keyboard instrument.

See also the village of Chamberlain, Saskatchewan, Canada