Sophia's Dairy is a historic home located at Aberdeen, Harford County, Maryland, United States. It is a large center-hall brick house, 64 feet by 45 feet, with a low stone wing, built in 1768 in the Georgian style. The interior features a double stair which extends upward on the west wall from both ends of the hall. It continues east in one short flight, then separates and parallels the lower flight to the second story hall.
Sophia's Dairy was listed on the National Register of Historic Places in 1973.