Wesley Abner D'Ewart (October 1, 1889 – September 2, 1973) was a U.S. Republican politician who served in the United States House of Representatives from Montana's 2nd congressional district from June 5, 1945, to January 3, 1955.

[1] When United States Congressman James F. O'Connor, who represented Montana's 2nd congressional district died on January 15, 1945, a special election was held to replace him, which D'Ewart won.

Following a close and contentious election, Murray narrowly defeated D'Ewart to win his final term in the Senate.

[4] D'Ewart served as an assistant to the United States Secretary of Agriculture from January 1955 to September 1955.

When incumbent Governor J. Hugo Aronson declined to seek reelection as Governor of Montana in 1960, D'Ewart ran to succeed him, and lost to former State Senator Donald Grant Nutter in the Republican primary by fewer than five hundred votes.