Charles Adain Ingram (March 19, 1867 – December 9, 1937) was an American lawyer and progressive Republican politician from Pepin County, Wisconsin.

He served as the 44th speaker of the Wisconsin State Assembly, and represented Buffalo and Pepin counties in the Assembly for three terms.

Born in Waubeek, Wisconsin, Ingram graduated from University of Wisconsin–Madison and then taught school.

Ingram was district attorney of Pepin County, Wisconsin, and then served in the Wisconsin State Assembly 1907-1913 as a Progressive Republican and served as speaker of the Wisconsin Assembly in the 1911 session.

He then went back to his law firm and publication business.