The Client, a book and film by John Grisham

The Client (The Office episode), a TV episode from the series The Office

Client (band), a british synthpop band

Client (computing), a piece of software that accesses services from another piece of software (a server)

Clients (album), an album by deathcore band The Red Chord

Client (ancient Rome), usually a freed slave or member of the plebeian class who was sponsored by a patron benefactor

Client (Client album), the above band's debut album

With respect to a professional services relationship, used to reference the party hiring a consultant. Used informally to describe any customer of a given service or product business.