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John Charles Marquez (born 5 June 1970) is a British actor and writer. He is best known for his role as PC Joseph Penhale in ITV drama series Doc Martin (2007–2022) and Ray Wilson in BBC One's drama In the Club (2014–2016).

Marquez was born in Coventry, England. He is the brother of actor Martin Marquez and uncle of Ramona Marquez.

• Una vida y dos mandados (1997)
• Jonathan Creek (1997) as Supermarket Manager
• The Trial of Tony Blair (2007)
• Doc Martin (2007–2022)
• Hotel Babylon (2008)
• In the Club (2014—2016)
• Death in Paradise (2017)
• Porridge (2017)
• Britannia (2019)

• John Marquez at IMDb