John McComish (born February 11, 1943) is an American politician and formerly a Republican member of the Arizona Senate representing District 18 from January 2013 to January 2015. McComish served multiple terms consecutively in the Arizona State Legislature from January 2005 until January 10, 2011, in the Arizona House of Representatives District 20 seat, then in the Arizona Senate in the District 20 seat from January 10, 2011, until January 14, 2013.