🇺🇸 United States ZIP Code

STANDARD

61370

Tonica

ZIP Code 61370 is a standard zip code serving Tonica, Tonica, Illinois (IL), in LaSalle County, United States. It has an estimated population of 1,460 with a median household income of $55,069. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 41.232700
Longitude: -89.089000

Geographic Details

Land Area: 52.48 mi²
Water Area: 0.04 mi²
Population Density: 28.0 people per mi² (25th percentile)
Bounding Box: 41.278612°N, 41.148649°S, -88.930516°E, -89.162686°W

With 1,460 residents spread across 52.48 square miles, this area has a population density of 28.0 people per square mile.

Demographics

1,460

Population

35th percentile

$55,069

Median Income

65th percentile

$124,900

Median Home Value

50th percentile

52.48 mi²

Land Area

The median household income in 61370 is $55,069, and the median home value is $124,900.

Housing

624

Total Units

583

Occupied Units

93.4%

Occupancy Rate

Similar ZIP Codes in Illinois

ZIP codes with similar median household income in Illinois.

61523

Chillicothe

$57,399

61008

Belvidere

$57,806

61533

Glasford

$55,208

60455

Bridgeview

$52,298

61018

Dakota

$52,813

62275

Pocahontas

$52,296

62067

Moro

$50,677

61754

Mc Lean

$63,309

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.