Plainfield, NJ Profile: Facts & Data


Plainfield Local Links & Resources:
Resources | ALL Plainfield Content
Planning to visit Plainfield? See Local Hotels

Also See: Plainfield, NJ ZIP Codes & ZIP Code Maps | Local Area Photos

Plainfield, New Jersey - Basic Facts

The City of Plainfield had a population of 51,492 as of July 1, 2020. Plainfield ranks in the upper 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 Plainfield is located at latitude 40.6337 and longitude -74.4074 in Union County. The formal boundaries for the City of Plainfield encompass a land area of 6.02 sq. miles and a water area of 0.01 sq. miles. Union County is in the Eastern time zone (GMT -5). The elevation is 118 feet.

The City of Plainfield (GNIS ID: 885355) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.


Plainfield, NJ Data & Demographics (As of July 1, 2020)


Total Population 51,492 (100%)
Population in Households 50,787 (98.6%)
Population in Families 40,467 (78.6%)
Population in Group Quarters1 705 ( 1.4%)
Population Density 8,641
Diversity Index2 86


Median Household Income $62,969
Average Household Income $84,308
% of Income for Mortgage4 18%
Per Capita Income $25,286
Wealth Index5 81


Total HU (Housing Units) 17,150 (100%)
Owner Occupied HU 7,084 (41.3%)
Renter Occupied HU 8,352 (48.7%)
Vacant Housing Units 1,713 ( 10.0%)
Median Home Value $265,902
Average Home Value $317,009
Housing Affordability Index3 90


Total Households 15,437
Average Household Size 3.29
Family Households 11,028
Average Family Size 4
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population 0.34% 0.28%
Households 0.18% 0.19%
Families 0.15% 0.19%
Median Household Income   1.36%
Per Capita Income   1.86%
Owner Occupied HU   0.29%


Plainfield, NJ - Peer Comparisons by Rank and Percentile

The table below compares Plainfield to the other 545 incorporated cities, towns and CDPs in New Jersey by rank and percentile using July 1, 2020 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 # 19 97th
Population Density # 38 93rd
Median Household Income # 438 20th
Housing Affordability Index # 108 20th
Per Capita Income # 506 7th
Diversity Index # 15 97th

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

Plainfield, NJ - Most Popular Things to Do

Also See: Nearby Photos | Nearby Hotels | Driving Directions

Use HTL Address Research for a New Jersey Address and get...

Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2020, data includes home values, household income, percentage of homes owned, rented or vacant, etc.

Quick & Easy Ways to...

  1. Get Current Demographic Data for Cities, Towns, and ZIP Codes
  2. View Boundary Maps, for Cities, Towns, and ZIP Codes
  3. Locate Physical, Cultural, and Historical Features

New Jersey Census Data Comparison Tool

Compare New Jersey July 1, 2020 Data
Highest or Lowest:

More Tools and Resources:

  1. For information about schools and school attendance zones, use the HTL Address Tool
  2. Our new HTL Neighborhood Explorer provides lots of detail about any neighborhood.
  3. The new 2-Minute Introduction and Concise Guide to Big Data which will help you make the most effective use of HomeTownLocator Tools.
  4. See the References & Data Sources page for more information about methodology and sources of data.
  5. See the New Jersey COVID-19 Data and US COVID-19 Data for more information on the spread of the novel coronavirus.