The Cook Farm is a collection of historic domestic and agricultural buildings located south of Charles City, Iowa, United States. It was listed on the National Register of Historic Places in 1976. The historic designation includes a large house (c. 1860), a smaller house (c. 1855), and a barn, all constructed in locally quarried limestone. There are very few agricultural stone buildings in Iowa. The main house is the most sophisticated of the three. The two-story structure features dressed limestone blocks laid in a random ashlar pattern, a front-gable main block, and a single-story dining/kitchen wing. The older house is a single-story structure composed of rubble stone. The barn's westernmost section has a unique cube shape.