The Peter and Isabelle McCulloch McQuie Milkhouse is a historic building located on a farm southwest of Earlham, Iowa, United States. The McQuies were natives of Scotland who immigrated to the US in 1857, and settled in Madison County in 1871. They bought a 320-acre (130 ha) farm that in time grew to 680 acres (280 ha). This building is an early example of a vernacular limestone farm building. The single-story structure is composed of ashlar and rubble stone that might have been quarried at Parkins Quarry in Madison Township. Two-thirds of the building housed the milkhouse. The other third was separated from the milkhouse by a stone wall, and may have housed a hired man. The building was listed on the National Register of Historic Places in 1987.