Carnes is an unincorporated rural small hamlet in Sioux County, in the U.S. state of Iowa.

[1] Presently, the hamlet consists of a pizza restaurant.

A post office was established at Carnes in 1890, and remained in operation until it was discontinued in 1914.

[2] The community was named for Edward Carnes, a railroad roadmaster.

This article about the geography of Sioux County, Iowa is a stub.