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Where 61604 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 61604 into a pocket calculator and turn it upside down: hOgIg — not quite a word, sorry.
- ➕ As a number, 61,604 = 2 × 2 × 15401. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1111000010100100 - 🏠 Its numerical neighbours: 61603 (Peoria, IL, 4 mi away) and 61605 (Peoria, IL, 2 mi away).
- 🔄 Backwards, 61604 becomes 40616, which is not a ZIP code at all.
- 👥 36 other ZIP codes are made of exactly the same digits (04616, 06146, 06416, 06461, 06614, 10466, …). The farthest-flung twin is 04616 in Brooklin, ME, 1,101 miles away.
- 🧭 Farther north than 63% of all ZIP codes, and farther west than 55%.
- 🎯474 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 61604 and you would come out at 40.71°S, 90.35°E — 1,145 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 15m.
- 📏 At 15.2 square miles of land, 61604 is bigger than 33% of ZIP codes — room for about 12 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 28,313This ZIP28,313 |
|---|---|
| Households | 12,176This ZIP12,176 |
| Housing units | 13,202This ZIP13,202 |
| Median age | 40.2This ZIP40.2Illinois39.0US 38.9 |
| Median household income | $52,414This ZIP$52,414Illinois$83,390US $80,734 |
| Median home value | $100,300This ZIP$100,300Illinois$263,300US $332,700 |
| Median gross rent | $884This ZIP$884Illinois$1,274US $1,413 |
| Bachelor's degree or higher | 22.5%This ZIP22.5% |
| Mean commute | 18.1 minThis ZIP18.1 min |
| Population density | 1,863.4 / sq miThis ZIP1,863.4 / sq mi |
Business and tax activity
| Business establishments | 426This ZIP426 |
|---|---|
| Employees | 6,719This ZIP6,719 |
| Annual payroll | $312,068,000This ZIP$312,068,000 |
| Tax returns filed | 13,510This ZIP13,510 |
| Total adjusted gross income | $654,549,000This ZIP$654,549,000 |
Land area
| Land area | 15.19 sq miThis ZIP15.19 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 61604
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 61604
| ZIP | City | Distance |
|---|---|---|
61625 | Peoria, IL | 2.1 mi |
61606 | Peoria, IL | 2.2 mi |
61605 | Peoria, IL | 2.2 mi |
61613 | Peoria, IL | 2.9 mi |
61636 | Peoria, IL | 3.1 mi |
61602 | Peoria, IL | 3.1 mi |
61633 | Peoria, IL | 3.2 mi |
61615 | Peoria, IL | 3.2 mi |
61637 | Peoria, IL | 3.3 mi |
61634 | Peoria, IL | 3.3 mi |
Find every ZIP code within 10 miles of 61604 →
Questions about this ZIP code
Where is ZIP code 61604?
61604 is in Peoria, Illinois, in Peoria County, part of the Peoria, IL metropolitan area. Its published point location is 40.7052, -89.6529.
What county is 61604 in?
61604 lies in Peoria County.
What area code is 61604?
Peoria uses area codes 309 and 861, from NANPA's telephone records.
What time zone is 61604 in?
61604 uses America/Chicago.
How many people live in 61604?
About 28,313 people live in ZIP code 61604, in 12,176 households, at 1,863.4 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 61604?
$52,414 a year, against $83,390 across Illinois.
What ZIP codes are near 61604?
The closest are 61625 (2.1 mi), 61606 (2.2 mi), 61605 (2.2 mi), 61613 (2.9 mi) and 61636 (3.1 mi).
Is 61604 a PO Box ZIP code?
61604 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “61604 ZIP Code — Peoria, Illinois (Peoria County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61604
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/61604.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.