Ashland is an unincorporated community and census-designated place (CDP) situated in Alameda County, California, within the United States. As of the 2020 census, the area had a population of 23,823.
The community is located in the historic Eden Township. It is bordered by the city of San Leandro to the north, the unincorporated community of Cherryland to the south, Castro Valley to the east, and San Lorenzo to the southwest.