Seabrook is an unincorporated community located within Upper Deerfield Township in Cumberland County, New Jersey, United States. The area is served as United States Postal Service ZIP code 08302. The unincorporated community and the census-designated Place Seabrook Farms within it are each named after Charles F. Seabrook, a businessman who at one point ran the largest irrigated truck farm in the world in this region.
As of the 2010 United States Census, the population for ZIP Code Tabulation Area 08302 was 46,872. As of the 2000 United States Census, the population was 44,450.