Sophia's Dairy is a historic home in Aberdeen, Harford County, Maryland, United States. It is a large center-hall brick house, , 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.