Woodlawn is an unincorporated community and a census-designated place in Baltimore County, Maryland, United States. The population was 36,079 at the 2000 census. It is home to both the headquarters of the Social Security Administration (SSA) as well as the Centers for Medicare and Medicaid Services (CMS). It is bordered by Catonsville on the south (many parts of Woodlawn are considered Catonsville by residents, especially those parts sharing the Catonsville zip code), by Randallstown on the west, by Lochearn to the north, and by the City of Baltimore to the east. Parts of Woodlawn are sometimes informally referred to as Security, Maryland, due to the importance of the SSA's headquarters as well as nearby Security Boulevard (Maryland Route 122) and Security Square Mall. The Lorraine Park Cemetery Gate Lodge and St. Mary's Episcopal Church were listed on the National Register of Historic Places in 1985.