🇺🇸 United States ZIP Code

STANDARD

61604

Peoria

ZIP Code 61604 is a standard zip code serving Peoria, Peoria, Illinois (IL), in Peoria County, United States. It has an estimated population of 31,647 with a median household income of $40,630. 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: Peoria
Timezone: America/Chicago

Coordinates

Latitude: 40.711100
Longitude: -89.632400

Geographic Details

Land Area: 15.79 mi²
Population Density: 2004.0 people per mi² (85th percentile)
Bounding Box: 40.735963°N, 40.663801°S, -89.592466°E, -89.718161°W

With 31,647 residents spread across 15.79 square miles, this area has a population density of 2004.0 people per square mile.

Demographics

31,647

Population

90th percentile

$40,630

Median Income

30th percentile

$90,400

Median Home Value

25th percentile

15.79 mi²

Land Area

The median household income in 61604 is $40,630, and the median home value is $90,400.

Housing

14,343

Total Units

13,061

Occupied Units

91.1%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Peoria, IL.

61601

Peoria

61602

Peoria

61603

Peoria

61605

Peoria

61606

Peoria

61607

Peoria

61612

Peoria

61613

Peoria

61614

Peoria

61615

Peoria

Similar ZIP Codes in Illinois

ZIP codes with similar median household income in Illinois.

60171

River Grove

$46,354

61846

Georgetown

$37,316

61616

Peoria Heights

$43,486

61244

East Moline

$43,741

62884

Sesser

$37,781

62938

Golconda

$38,809

62821

Carmi

$39,010

61379

Wyanet

$37,188

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.