Milford Mill is an unincorporated community and census-designated place in Baltimore County, Maryland, United States. Per the 2020 census, the population was 30,622. According to the United States Census Bureau, the CDP has a total area of 7.0 square miles, all of it land. The true name of the area is "Milford", but the name "Milford Mill" has stuck with the community. The name "Milford Mill" comes from the name of an old mill located in nearby Pikesville along Milford Mill Road.