Westfield is a town in Union County of New Jersey, United States. As of the 2010 United States Census, the town’s population was 30,316, reflecting an increase of 672 (+2.3%) from the 29,644 counted in the 2000 Census, which had in turn increased by 774 (+2.7%) from the 28,870 counted in the 1990 Census. In March 2018, Bloomberg ranked Westfield as the 99th wealthiest place in the United States, and the 18th wealthiest in New Jersey. According to a 2014 nationwide survey, Westfield is considered to be the 30th-safest city to live in the United States.
According to the United States Census Bureau, the town had a total area of 6.743 square miles (17.463 km), including 6.719 square miles (17.401 km) of land and 0.024 square miles (0.062 km) of water (0.36%).
Unincorporated communities, localities and place names located partially or completely within the township include Germantown and Tamaques Reservation Mill.
Six municipalities border the town of Westfield: Mountainside to the north, Springfield Township to the northeast, Garwood and Cranford to the east, Clark to the southeast, and Scotch Plains to the west and southwest.
The upper reaches of the Rahway River Parkway run through the township along tributaries of the Rahway River.
As of the 2010 United States Census, there were 30,316 people, 10,566 households, and 8,199.216 families residing in the town. The population density was 4,512.2 per square mile (1,742.2/km). There were 10,950 housing units at an average density of 1,629.8 per square mile (629.3/km). The racial makeup of the town was 88.17% (26,729) White, 3.25% (984) Black or African American, 0.12% (36) Native American, 5.67% (1,718) Asian, 0.03% (10) Pacific Islander, 0.79% (241) from other races, and 1.97% (598) from two or more races. Hispanic or Latino of any race were 4.92% (1,492) of the population.
There were 10,566 households out of which 43.1% had children under the age of 18 living with them, 68.0% were married couples living together, 7.5% had a female householder with no husband present, and 22.4% were non-families. 19.2% of all households were made up of individuals, and 9.8% had someone living alone who was 65 years of age or older. The average household size was 2.85 and the average family size was 3.31.
In the town, the population was spread out with 30.0% under the age of 18, 4.7% from 18 to 24, 22.5% from 25 to 44, 29.7% from 45 to 64, and 13.1% who were 65 years of age or older. The median age was 41.0 years. For every 100 females there were 92.7 males. For every 100 females ages 18 and older there were 87.2 males.
The Census Bureau’s 2006–2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $127,799 (with a margin of error of +/− $10,580) and the median family income was $150,797 (+/− $11,480). Males had a median income of $111,762 (+/− $7,767) versus $71,217 (+/− $5,624) for females. The per capita income for the town was $63,498 (+/− $4,577). About 0.9% of families and 2.3% of the population were below the poverty line, including 2.4% of those under age 18 and 2.0% of those age 65 or over.
As of the 2000 United States Census there were 29,644 people, 10,622 households, and 8,178 families residing in the town. The population density was 4,403.1 people per square mile (1,700.7/km²). There were 10,819 housing units at an average density of 1,607.0 per square mile (620.7/km²). The racial makeup of the town was 89.98% White, 3.88% African American, 0.09% Native American, 4.08% Asian, 0.01% Pacific Islander, 0.62% from other races, and 1.33% from two or more races. Hispanic or Latino of any race were 2.82% of the population.
There were 10,622 households out of which 40.8% had children under the age of 18 living with them, 68.0% were married couples living together, 7.1% had a female householder with no husband present, and 23.0% were non-families. Of all households, 19.3% were made up of individuals and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.20.
In the town, the population was spread out with 28.4% under the age of 18, 4.0% from 18 to 24, 29.6% from 25 to 44, 24.5% from 45 to 64, and 13.5% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 92.1 males. For every 100 females age 18 and over, there were 87.4 males.
The median income for a household in the town was $98,390, and the median income for a family was $112,145. Males had a median income of $82,420 versus $45,305 for females. The per capita income for the town was $47,187. About 1.7% of families and 2.7% of the population were below the poverty line, including 3.3% of those under age 18 and 3.1% of those age 65 or over.