Avenel is a census-designated place and unincorporated area within Woodbridge Township, in Middlesex County, New Jersey. Its population at the 2000 census was 17,552. The East Jersey State Prison is located here, near the region that borders Rahway.
The CDP has a total area of 3.5 square miles. 3.4 sq miles of it is land and 0.04 sq mile of it (0.58%) is water.
Bradco Supply, one of the leading distributors of building products in the US, has its headquarters in Avenel.
The economy is primarily based on local businesses, professional services, sales and service, production, construction and transport of materials.