Woodlawn is an unincorporated community and census-designated place in Baltimore County, Maryland. Per the 2020 census, the population was 39,986. It is home to the headquarters of the Social Security Administration and the Centers for Medicare and Medicaid Services. It is bordered by Catonsville on the south, by the Patapsco River and Howard County on the west, by Randallstown and Lochearn to the north, and by the City of Baltimore to the east.