Charles A. Rawson (May 29, 1867 - September 2, 1936) was a United States Senator from Iowa. Born in Des Moines, he attended the public schools and Grinnell College. He engaged in banking and the insurance business and also in the manufacture of clay products, and was a member of the board of trustees of Grinnell College. He was State chairman of the war work council of the Young Men's Christian Association and served overseas with that organization during the First World War.
On February 24, 1922, Rawson was appointed as a Republican to the U.S. Senate to fill the vacancy caused by the resignation of and served from February 24 to December 1, 1922, when a successor was elected and qualified. He was not a candidate for election to fill this vacancy, and was a member of the Republican National Committee from 1924 to 1932. He resumed the manufacture of clay products and was also interested in banking. Rawson died in Des Moines in 1936; interment was in Woodland Cemetery.