Oak Ridge is an unincorporated community within West Milford in Passaic County and Jefferson Township in Morris County, New Jersey, United States. The area is served as United States Postal Service ZIP Code 07438. The Headley family was the first family to settle in Oak Ridge (Jefferson). As of the 2000 United States Census, the population for ZIP Code Tabulation Area 07438 was 11,901.
This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Oak Ridge has a humid continental climate, abbreviated "Dfb" on climate maps.