Greenacres /ɡriːnˈeɪkəz/, archaically Greenacres Moor, is an area of Oldham, in Greater Manchester, England. It lies on the west side of the River Medlock opposite the village of Lees.
An upland area, rising gently in altitude from west to east, Greenacres is a residential area located next to parts of Clarksfield, Waterhead, Mumps and Derker, all in the east of Oldham.