Today 20634, Great Mills MD is count around 9 homes for sale at current average listing price of $312,311. Nearby neighborhoods of 20634 are Westmeath, Cecil's Mill, Greenview Knolls, Greenview Village, Greenview West, Heards Estates, Saint Georges Hundred, Westmeath Condos. Most of 20634 homes are 3 bedrooms with 3 bathrooms.