Erma, NJ Profile: Facts, Map & Data


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Erma, New Jersey - Basic Facts

The Erma Census Designated Place had a population of 2,216 as of July 1, 2017. Erma ranks in the lower quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New Jersey. See peer rankings below.

The primary coordinate point for Erma is located at latitude 38.9948 and longitude -74.892 in Cape May County. The formal boundaries for the Erma Census Designated Place (see map below) encompass a land area of 3.26 sq. miles and a water area of 0.1 sq. miles. Cape May County is in the Eastern time zone (GMT -5). The elevation is 20 feet.

The Erma Census Designated Place (GNIS ID: 2389049) 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 Erma Census Designated Place is located within Township of Lower, a minor civil division (MCD) of Cape May County.

Beneath the boundary map are tables with Erma 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 Erma: Swaintown.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


Erma Census Designated Place, NJ Boundary Map

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Boundary Maps: Township of Lower | Cape May County | New Jersey Counties

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


Total Population 2,216
Daytime Population: Workers 248
Daytime Population: Residents 659
Total Daytime Population (TDP) 907
Ratio TDP/Total Population1 0.41
Population in Households 2,207
Population in Familes 1,893
Population in Group Qrtrs 9
Population Density2 679
Diversity Index3 16


Median Household Income $76,939
Average Household Income $87,411
Per Capita Income $33,252


Total Housing Units 1,011 (100%)
Owner Occupied HU 716 (70.8%)
Renter Occupied HU 135 (13.4%)
Vacant Housing Units 160 (15.8%)
Median Home Value $285,337
Average Home Value $348,152


Total Households 851
Average Household Size 2.59
Family Households 629
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 0.52% 0.12%
Households 0.5% 0.07%
Families 0.75% 0.03%
Median Household Income   2.27%
Per Capita Income   2.71%

Erma, NJ - Peer Comparisons by Rank and Percentile

The table below compares Erma 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 # 390 29th
Population Density # 462 15th
Diversity Index # 486 11th
Median Household Income # 285 48th
Per Capita Income # 356 35th

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

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