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.GeographyAccording 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.DemographicsCensus 2010The Census Bureau's 2006-2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $127,450 (with a margin of error of +/- $8,852) and the median family income was $135,833 (+/- $6,654). Males had a median income of $92,262 (+/- $13,007) versus $62,845 (+/- $6,933) for females. The per capita income for the borough was $43,194 (+/- $2,939). About 0.6% of families and 2.2% of the population were below the poverty line, including 0.0% of those under age 18 and 2.8% of those age 65 or over.