🇺🇸 United States ZIP Code

STANDARD

61523

Chillicothe

ZIP Code 61523 is a standard zip code serving Chillicothe, Chillicothe, Illinois (IL), in Peoria County, United States. It has an estimated population of 11,204 with a median household income of $57,399. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 40.901300
Longitude: -89.506800

Geographic Details

Land Area: 53.39 mi²
Water Area: 2.30 mi²
Population Density: 210.0 people per mi² (60th percentile)
Bounding Box: 41.002790°N, 40.820794°S, -89.447693°E, -89.610418°W

With 11,204 residents spread across 53.39 square miles, this area has a population density of 210.0 people per square mile.

Demographics

11,204

Population

70th percentile

$57,399

Median Income

70th percentile

$128,600

Median Home Value

50th percentile

53.39 mi²

Land Area

The median household income in 61523 is $57,399, and the median home value is $128,600.

Housing

4,842

Total Units

4,562

Occupied Units

94.2%

Occupancy Rate

Similar ZIP Codes in Illinois

ZIP codes with similar median household income in Illinois.

61569

Trivoli

$55,476

60040

Highwood

$54,612

60041

Ingleside

$58,816

61070

Rock City

$52,607

60070

Prospect Heights

$61,188

61910

Arcola

$49,613

62816

Bonnie

$50,809

61534

Green Valley

$57,321

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.