Alderwood Manor is a census-designated place (CDP) in Snohomish County, Washington, United States. The population was 8,442 at the 2010 census. Prior to the 2000 census, Alderwood Manor was counted as part of the Alderwood Manor-Bothell North CDP. Most of Alderwood Manor lies in the Lynnwood MUGA (Municipal Urban Growth Area) meaning that area of Alderwood Manor uses a Lynnwood postal address.
According to the United States Census Bureau, the CDP has a total area of 4.8 square miles (12.4 km²).
Alderwood Manor was a community that is now the cities of Lynnwood, Brier, and Mountlake Terrace. Alderwood Manor was a farming community where most residents raised chickens. Alderwood Manor was connected to Everett and Seattle by an Interurban trolley system. Most signs of Alderwood have since disappeared but in 2004 Lynnwood's Heritage Park opened. The Heritage Park has some old buildings of the Lynnwood area such as The Wickers Building which served as Alderwood's main store and post office from 1919-1960s, it was still was open in the 1990s. Other buildings included car 55 of the interurban trolley system.