🇺🇸 United States ZIP Code

STANDARD

60431

Joliet

ZIP Code 60431 is a standard zip code serving Joliet, Joliet, Illinois (IL), in Will County, United States. It has an estimated population of 22,577 with a median household income of $81,037. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Illinois (IL)
County: Will
City: Joliet
Timezone: America/Chicago

Coordinates

Latitude: 41.471200
Longitude: -87.939100

Geographic Details

Land Area: 13.63 mi²
Water Area: 0.04 mi²
Population Density: 1657.0 people per mi² (80th percentile)
Bounding Box: 41.588490°N, 41.486452°S, -88.142988°E, -88.294600°W

With 22,577 residents spread across 13.63 square miles, this area has a population density of 1657.0 people per square mile.

Demographics

22,577

Population

80th percentile

$81,037

Median Income

90th percentile

$187,000

Median Home Value

70th percentile

13.63 mi²

Land Area

The median household income in 60431 is $81,037, and the median home value is $187,000. This places the area in the top 25% nationally for household income.

Housing

8,110

Total Units

7,585

Occupied Units

93.5%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Joliet, IL.

60432

Joliet

60433

Joliet

60434

Joliet

60435

Joliet

60436

Joliet

Similar ZIP Codes in Illinois

ZIP codes with similar median household income in Illinois.

60439

Lemont

$92,089

61232

Andalusia

$72,604

60046

Lake Villa

$87,107

60430

Homewood

$72,754

60560

Yorkville

$83,634

60611

Chicago

$85,642

60148

Lombard

$70,448

60544

Plainfield

$74,603

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.