Augustus Caesar Dodge (January 2, 1812 - November 20, 1883) was one of the first two United States Senators to represent the state of Iowa after it was admitted to the Union as a state in 1846. Immediately prior to his service as a Senator, Dodge represented the Territory of Iowa in Congress from 1839 to 1846. Dodge served in the Senate from 1846 to 1855, when he resigned to accept a diplomatic position.
Dodge was a member of the Democratic party. He unsuccessfully ran for Governor of Iowa in 1859.
His father, Henry Dodge, served as a US Senator from Wisconsin. They are the first, and so far only father-son pair to serve concurrently in the US Senate at the same time.