Williamstown, NJ Profile: Facts, Map & Data


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Williamstown, New Jersey - Basic Facts

The Williamstown Census Designated Place had a population of 15,771 as of July 1, 2017.

The primary coordinate point for Williamstown is located at latitude 39.6841 and longitude -74.9688 in Gloucester County. The formal boundaries for the Williamstown Census Designated Place (see map below) encompass a land area of 7.42 sq. miles and a water area of 0 sq. miles. Gloucester County is in the Eastern time zone (GMT -5). The elevation is 144 feet.

The Williamstown Census Designated Place (GNIS ID: 2390518) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Williamstown Census Designated Place is located within Township of Monroe, a minor civil division (MCD) of Gloucester County.

Beneath the boundary map are tables with Williamstown population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Williamstown: Squankum, Squankum Neck, Squankum Village, Williams Town.

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Williamstown Census Designated Place, NJ Boundary Map

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Boundary Maps: Township of Monroe | Gloucester County | New Jersey Counties

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Williamstown, NJ Data & Demographics (As of July 1, 2017)


Total Population 15,771
Daytime Population: Workers 3,463
Daytime Population: Residents 7,910
Total Daytime Population (TDP) 11,373
Ratio TDP/Total Population1 0.72
Population in Households 15,615
Population in Familes 13,282
Population in Group Qrtrs 156
Population Density2 2,126
Diversity Index3 46


Median Household Income $59,323
Average Household Income $76,029
Per Capita Income $27,652


Total Housing Units 5,947 (100%)
Owner Occupied HU 4,059 (68.3%)
Renter Occupied HU 1,547 (26.0%)
Vacant Housing Units 341 ( 5.7%)
Median Home Value $203,991
Average Home Value $225,690


Total Households 5,606
Average Household Size 2.79
Family Households 4,017
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.18% 0.27%
Households 0.03% 0.19%
Families -0.07% 0.18%
Median Household Income   1.53%
Per Capita Income   2.34%

Williamstown, NJ - Peer Comparisons by Rank and Percentile

The table below compares Williamstown to the other 545 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 72 87th
Population Density # 321 41st
Diversity Index # 237 57th
Median Household Income # 410 25th
Per Capita Income # 450 18th

Additional comparisons and rankings can be made with a VERY EASY TO USE New Jersey Census Data Comparison Tool.

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