Thomas Cooper Evans was a three-term Republican U.S. Representative from Iowa's 3rd congressional district. First elected to Congress in a close race amidst a Republican landslide, in a district that became less Republican through reapportionment, Evans defied expectations by winning re-election by increasingly large margins.

Iowa's 3rd congressional district is a congressional district in the U.S. state of Iowa that covers its southwestern quadrant, which roughly consists of an area stretching from Des Moines to the borders with Missouri.