Charles Augustus Eldredge (February 27, 1820 – October 26, 1896) was an American lawyer and Democratic politician.

In 1848, he moved to the new state of Wisconsin, settling at Fond du Lac, where he resumed his legal practice.

From Fond du Lac County, he was elected as a Democrat to the Wisconsin State Senate for the 1854 and 1855 sessions.

In 1862, after Wisconsin's congressional delegation was expanded from three seats to six, Eldredge was elected to the 38th United States Congress as the first representative of Wisconsin's 4th congressional district, which at the time comprised the counties of Ozaukee, Washington, Dodge, Fond du Lac, and Sheboygan.

Bragg engaged in a years-long feud with Eldredge and challenged him in several Democratic nominating conventions.