Isaac Ruth Sherwood (August 13, 1835 – October 15, 1925) was an American politician and newspaper editor from Toledo, Ohio, as well as an officer in the Union army during the Civil War.

He served nine terms in the United States Congress, and was a noted pacifist during World War I. Sherwood was born in Stanford, New York.

Soon after President Abraham Lincoln's call for volunteers in April 1861, Sherwood resigned from his judgeship and enlisted as a private in the 14th Ohio Infantry.

Sherwood transferred to the 111th Ohio Infantry, initially serving as adjutant, but mustered out with the regiment as lieutenant colonel.

[2] After the war he became a companion of the Ohio Commandery of the Military Order of the Loyal Legion of the United States.

Once his term in Congress had ended, Sherwood returned to Cleveland and served as the owner and editor of the Toledo Journal from 1875 to 1884.

Sherwood's pacifist views made him very unpopular in his home state, where Ohioans believed that he was being unpatriotic.