Brownville, New Jersey

Brownville is an unincorporated community and census-designated place (CDP) in Old Bridge Township, Middlesex County, New Jersey, United States. As of the 2020 census, the population was 2,746, up from 2,383 in 2010.

Geography
Brownville is in eastern Middlesex County, less than 2 mi from the Monmouth County line. The community is near the center of Old Bridge Township, and the community of Old Bridge borders Brownville to the west and south. U.S. Route 9 forms the western border of Brownville; the highway leads north 5 mi to South Amboy and south 11 mi to Freehold. County Route 516 crosses the center of Brownville, leading west 3.5 mi to Route 18 in the western part of Old Bridge and east 4 mi to the center of Matawan. The intersection known as Cottrell Corners is in the center of the Brownville CDP.

According to the U.S. Census Bureau, the CDP has a total area of 1.07 mi2, of which 0.001 mi2, or 0.09%, are water. The community drains north toward Tennent Brook, a west-flowing tributary of the South River, part of the Raritan River watershed leading to New York Bay.

2010 census
The 2010 United States census counted 2,383 people, 1,000 households, and 659 families in the CDP. The population density was 2379.4 /mi2. There were 1,028 housing units at an average density of 1026.4 /mi2. The racial makeup was 80.19% (1,911) White, 5.04% (120) Black or African American, 0.04% (1) Native American, 10.07% (240) Asian, 0.08% (2) Pacific Islander, 1.97% (47) from other races, and 2.60% (62) from two or more races. Hispanic or Latino of any race were 11.20% (267) of the population.

Of the 1,000 households, 27.5% had children under the age of 18; 49.0% were married couples living together; 13.8% had a female householder with no husband present and 34.1% were non-families. Of all households, 28.4% were made up of individuals and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.97.

19.8% of the population were under the age of 18, 6.6% from 18 to 24, 28.9% from 25 to 44, 32.4% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 41.7 years. For every 100 females, the population had 78.6 males. For every 100 females ages 18 and older there were 74.3 males.

2000 census
As of the 2000 United States Census there were 2,660 people, 1,165 households, and 709 families living in the CDP. The population density was 1,092.6 /km2. There were 1,186 housing units at an average density of 487.1 /km2. The racial makeup of the CDP was 84.29% White, 4.62% African American, 0.04% Native American, 8.12% Asian, 1.17% from other races, and 1.77% from two or more races. Hispanic or Latino of any race were 5.86% of the population.

There were 1,165 households, out of which 28.0% had children under the age of 18 living with them, 48.8% were married couples living together, 9.0% had a female householder with no husband present, and 39.1% were non-families. 35.2% of all households were made up of individuals, and 17.4% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.99.

In the CDP the population was spread out, with 21.8% under the age of 18, 4.9% from 18 to 24, 31.9% from 25 to 44, 25.1% from 45 to 64, and 16.3% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 81.1 males. For every 100 females age 18 and over, there were 76.6 males.

The median income for a household in the CDP was $61,750, and the median income for a family was $83,636. Males had a median income of $56,111 versus $44,750 for females. The per capita income for the CDP was $30,520. About 2.7% of families and 6.3% of the population were below the poverty line, including 3.3% of those under age 18 and 19.9% of those age 65 or over.