PolitiFinder

1990 Illinois U.S. House District 21 Election

Illinois · 2 candidates · See every 1990 U.S. House race

Who won the 1990 Illinois U.S. House District 21 Election?

Jerry F. Costello won the 1990 Illinois U.S. House District 21 Election. Jerry F. Costello received 95,208 popular votes (66.04%). The main challenger was Robert H. Gaffner (33.96%).

See the full head-to-head between Costello and Gaffner

Costello +32.1 pts · won by 46,259 votes
Jerry F. CostelloDemocraticWINNER66.04%
95,208 votes
Robert H. GaffnerRepublican33.96%
48,949 votes
Popular-vote totals for U.S. House elections come from the MIT Election Data and Science Lab (1976–2024).

Data last verified July 28, 2026.