John Carl Kluczynski (February 15, 1896 – January 26, 1975) was an American World War I veteran who served 13 terms as a U.S. Representative from Illinois, representing the 5th district from 1951 until his death from a heart attack in Chicago, Illinois in 1975.

He worked in the catering business upon returning to Chicago, and served in the Illinois House of Representatives from 1933 through 1948.

In 1948, Kluczynski was elected to the Illinois Senate in 1948 where he served until December 1949.

[2] While in Congress, he served as chairman of the Public Works subcommittee on transportation.

[5] This article incorporates public domain material from the Biographical Directory of the United States Congress