Fanwood is a borough in Union County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 7,318 reflecting an increase of 144 (+2.0%) from the 7,174 counted in the 2000 Census, which had in turn increased by 59 (+0.8%) from the 7,115 counted in the 1990 Census.
Fanwood was incorporated as a borough by an act of the New Jersey Legislature on October 2, 1895, from portions of Fanwood Township (now known as Scotch Plains), based on the results of a referendum held the previous day. The borough was named for Fannie Wood, an author.
According to the United States Census Bureau, Fanwood borough had a total area of 1.342 square miles (3.475 km2), all of which was land.
The borough is bordered by Plainfield in the southwest and by Scotch Plains in all other directions.
The 2010 United States Census counted 7,318 people, 2,627 households, and 2,070.076 families in the borough. The population density was 5,454.1 per square mile (2,105.8/km2). There were 2,686 housing units at an average density of 2,001.9 per square mile (772.9/km2). The racial makeup of the borough was 84.72% (6,200) White, 5.30% (388) Black or African American, 0.14% (10) Native American, 6.75% (494) Asian, 0.00% (0) Pacific Islander, 0.97% (71) from other races, and 2.12% (155) from two or more races. Hispanic or Latino of any race were 6.26% (458) of the population.
The 2,627 households accounted 41.0% with children under the age of 18 living with them; 68.7% were married couples living together; 7.9% had a female householder with no husband present, and 21.2% were non-families. Of all households, 18.8% were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older. The average household size was 2.78 and the average family size was 3.19.
In the borough, the population age was spread out with 27.7% under the age of 18, 4.8% from 18 to 24, 25.5% from 25 to 44, 28.0% from 45 to 64, and 14.0% who were 65 years of age or older. The median age was 40.5 years.