Allenwood is a census-designated place and unincorporated area located within Wall Township, in Monmouth County, New Jersey. Its population at the 2010 census was 928. The CDP has a total area of 4.7 km². 4.7 km² of it is land and 0.1 km² of it (1.09%) is water.
The economy is based on local businesses, professional services, sales and service, and production, construction and transport of materials.