Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/61370

61370

ZIP 61370 is Tonica, Illinois, in LaSalle County; area codes 779 and 815; Central time.

Type
Standard
Time zone
America/Chicago
County
LaSalle
Metro area
Ottawa, IL
Population
1,215
Coordinates
41.2107, -89.0388
☼ Live from 61370 — Tonica, IL

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 61370 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.

★ Weird and wonderful facts about 61370
  • 🔢 Type 61370 into a pocket calculator and turn it upside down: OLEIg — not quite a word, sorry.
  • ➕ As a number, 61,370 = 2 × 5 × 17 × 19 × 19. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110111110111010
  • 🏠 Its numerical neighbours: 61369 (Toluca, IL, 17 mi away) and 61371 (Triumph, IL, 20 mi away).
  • 🔄 Backwards, 61370 becomes 07316, which is not a ZIP code at all.
  • 👥 63 other ZIP codes are made of exactly the same digits (01367, 01376, 06137, 06371, 07631, 13076, …). The farthest-flung twin is 06371 in Old Lyme, CT, 867 miles away.
  • 🧭 Farther north than 68% of all ZIP codes, and farther west than 53%.
  • 🎯510 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 61370 and you would come out at 41.21°S, 90.96°E — 1,149 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 09m of daylight. Shortest: 9h 12m.
  • 📏 At 44.6 square miles of land, 61370 is bigger than 56% of ZIP codes — room for about 34 Central Parks.
🌙 The sky over 61370 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,215This ZIP1,215
Households471This ZIP471
Housing units506This ZIP506
Median age41.2This ZIP41.2Illinois39.0US 38.9
Median household income$91,094This ZIP$91,094Illinois$83,390US $80,734
Median home value$155,100This ZIP$155,100Illinois$263,300US $332,700
Median gross rent$900This ZIP$900Illinois$1,274US $1,413
Bachelor's degree or higher17.6%This ZIP17.6%
Mean commute28.6 minThis ZIP28.6 min
Population density27.2 / sq miThis ZIP27.2 / sq mi

Business and tax activity

Business establishments32This ZIP32
Employees210This ZIP210
Annual payroll$13,486,000This ZIP$13,486,000
Tax returns filed710This ZIP710
Total adjusted gross income$57,949,000This ZIP$57,949,000

Land area

Land area44.60 sq miThis ZIP44.60 sq mi
Water area0.04 sq miThis ZIP0.04 sq mi

Other place names in 61370

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 61370

ZIPCityDistance
61332 Leonore, IL 3.2 mi
61348 Oglesby, IL 5.2 mi
61334 Lostant, IL 5.4 mi
61316 Cedar Point, IL 5.6 mi
61363 Standard, IL 8.0 mi
61377 Wenona, IL 10.0 mi
61354 Peru, IL 10.1 mi
61326 Granville, IL 10.2 mi
61335 Mc Nabb, IL 10.8 mi
61336 Magnolia, IL 11.3 mi

Find every ZIP code within 10 miles of 61370 →

Questions about this ZIP code

Where is ZIP code 61370?

61370 is in Tonica, Illinois, in LaSalle County, part of the Ottawa, IL micropolitan area. Its published point location is 41.2107, -89.0388.

What county is 61370 in?

61370 lies in LaSalle County.

What area code is 61370?

Tonica uses area codes 779 and 815, from NANPA's telephone records.

What time zone is 61370 in?

61370 uses America/Chicago.

How many people live in 61370?

About 1,215 people live in ZIP code 61370, in 471 households, at 27.2 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 61370?

$91,094 a year, against $83,390 across Illinois.

What ZIP codes are near 61370?

The closest are 61332 (3.2 mi), 61348 (5.2 mi), 61334 (5.4 mi), 61316 (5.6 mi) and 61363 (8 mi).

Is 61370 a PO Box ZIP code?

61370 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “61370 ZIP Code — Tonica, Illinois (LaSalle County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61370

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/61370.json

Underlying data is public domain or openly licensed — sources, vintages and licences.