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,

Geography

Brownville is in eastern Middlesex County, less than 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 to South Amboy and south to Freehold. County Route 516 crosses the center of Brownville, leading west to Route 18 in the western part of Old Bridge and east 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 , of which , or 0.09%, are water.

Racial and ethnic composition

{| class="wikitable sortable" style="text-align:center;"

|+Brownville CDP, New Jersey – Racial and ethnic composition<br><small></small>

!Race / Ethnicity <small>(NH = Non-Hispanic)</small>

!Pop 2000

!Pop 2010

!style="background-color: #ffffb3;" |Pop 2020

!% 2000

!% 2010

!style="background-color: #ffffb3;" |% 2020

|-

|White alone (NH)

|2,129

|1,731

|style='background: #ffffe6; |1,851

|80.04%

|72.64%

|style='background: #ffffe6; |67.41%

|-

|Black or African American alone (NH)

|122

|110

|style='background: #ffffe6; |117

|4.59%

|4.62%

|style='background: #ffffe6; |4.26%

|-

|Native American or Alaska Native alone (NH)

|1

|0

|style='background: #ffffe6; |3

|0.04%

|0.00%

|style='background: #ffffe6; |0.11%

|-

|Asian alone (NH)

|215

|236

|style='background: #ffffe6; |291

|8.08%

|9.90%

|style='background: #ffffe6; |10.60%

|-

|Native Hawaiian or Pacific Islander alone (NH)

|0

|2

|style='background: #ffffe6; |1

|0.00%

|0.08%

|style='background: #ffffe6; |0.04%

|-

|Other race alone (NH)

|4

|2

|style='background: #ffffe6; |16

|0.15%

|0.08%

|style='background: #ffffe6; |0.58%

|-

|Mixed race or Multiracial (NH)

|33

|35

|style='background: #ffffe6; |102

|1.24%

|1.47%

|style='background: #ffffe6; |3.71%

|-

|Hispanic or Latino (any race)

|156

|267

|style='background: #ffffe6; |365

|5.86%

|11.20%

|style='background: #ffffe6; |13.29%

|-

|Total

|2,660

|2,383

|style='background: #ffffe6; |2,746

|100.00%

|100.00%

|style='background: #ffffe6; |100.00%

|}

2020 census

As of the 2020 census, Brownville had a population of 2,746. The median age was 41.7 years. 18.5% of residents were under the age of 18 and 17.6% of residents were 65 years of age or older. For every 100 females there were 83.9 males, and for every 100 females age 18 and over there were 80.5 males age 18 and over.

99.4% of residents lived in urban areas, while 0.6% lived in rural areas.

There were 1,142 households in Brownville, of which 29.2% had children under the age of 18 living in them. Of all households, 52.8% were married-couple households, 10.9% were households with a male householder and no spouse or partner present, and 30.3% were households with a female householder and no spouse or partner present. About 25.9% of all households were made up of individuals and 11.2% had someone living alone who was 65 years of age or older.

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.