John Neal Erlenborn (February 8, 1927 – October 30, 2005) was an American lawyer and a former Republican member of the U.S. Congressional Delegations from Illinois, representing the 14th (then after 1980s redistricting the 13th) district. Born in Chicago, Illinois, Erlenborn attended Immaculate Conception High School (Elmhurst, Illinois), Loyola University Chicago and Loyola University Chicago School of Law. He represented his district for twenty years, from January 1965 to January 1985, a period which began with the 89th U.S. Congress. He retired after serving in the 98th U.S. Congress.