The James H. and Mayetta (Degrush) McCartney House, also known as the Ann E. and DeWitt McLallen House, is a historic building located in Mount Vernon, Iowa, United States.

It was probably built sometime after Saxby's First Addition to Mount Vernon, in which it is located, was platted in 1855.

A two-story wood-frame addition was built onto the rear of the brick structure in 1877.

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