Zan Ganassa (, ; - ) was the stage name of an early actor-manager of commedia dell'arte, whose company was one of the first to tour outside Italy. Ganassa's real name was probably Alberto Naseli (also spelled Naselli).

He was known for playing Zanni, comic servant roles, hence his stage name, and is one of the first actors believed to have played the Zanni subtype known as Harlequin