Farmington, IL 61531 ZIP Code Profile

Related Place Profiles:
Farmington, IL | Middlegrove, IL

ZIP Code 61531: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Farmington, IL 61531

Acceptable Alternative
Middlegrove, IL 61531

  • ZIP Code Type: STANDARD
  • County: Fulton County
  • Centroid: Latitude 40.704, Longitude -90.099
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes

ZIP Code 61531 has segments in 2 Counties (Fulton, Peoria).

  • Businesses Addresses: 130
  • PO Box Addresses: 59
  • Residential Addresses: 1,363
    • Multi-Family Addresses: 4
    • Single Family Addresses: 1,359

The ZIP Code maps and database are updated 4 times per year.
Database updated: August 1, 2018, Maps updated: August 1, 2018.

EXTREMELY LOCAL Demographic 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 demographic data.


Farmington, IL 61531 Data & Demographics (As of July 1, 2018)


Total Population 3,235
Population in Households 3,147
Population in Familes 2,607
Population in Group Qrtrs 88
Population Density2 97
Diversity Index3 7


Median Household Income $51,891
Average Household Income $61,307
Per Capita Income $24,298


Total Housing Units 1,405 (100%)
Owner Occupied HU 1,006 (71.6%)
Renter Occupied HU 261 (18.6%)
Vacant Housing Units 138 ( 9.8%)
Median Home Value $106,308
Average Home Value $151,143


Total Households 1,267
Average Household Size 2.48
Family Households 849
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 -0.19% -0.41%
Households -0.18% -0.4%
Families -0.38% -0.52%
Median Household Income   2.78%
Per Capita Income   3.54%

Farmington, IL 61531 - Peer Comparisons by Rank and Percentile

The table below compares 61531 to the other 1,378 ZIP Codes in Illinois by rank and percentile using July 1, 2018 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 # 563 59th
Population Density # 605 56th
Diversity Index # 1082 22nd
Median Household Income # 872 37th
Per Capita Income # 1084 21st

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

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