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/61730

61730

ZIP 61730 is Cooksville, Illinois, in McLean County; area code 309; Central time.

Type
Standard
Time zone
America/Chicago
County
McLean
Metro area
Bloomington, IL
Population
361
Coordinates
40.5326, -88.7344
☼ Live from 61730 — Cooksville, IL

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 61730 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 61730
  • 🔢 Type 61730 into a pocket calculator and turn it upside down: OELIg — not quite a word, sorry.
  • ➕ As a number, 61,730 = 2 × 5 × 6173. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1111000100100010
  • 🏠 Its numerical neighbours: 61729 (Congerville, IL, 26 mi away) and 61731 (Cropsey, IL, 14 mi away).
  • 🔄 Backwards, 61730 becomes 03716, 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, 857 miles away.
  • 🧭 Farther north than 61% of all ZIP codes, and farther west than 53%.
  • 🎯522 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 61730 and you would come out at 40.53°S, 91.27°E — 1,190 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 04m of daylight. Shortest: 9h 16m.
  • 📏 At 29.0 square miles of land, 61730 is bigger than 45% of ZIP codes — room for about 22 Central Parks.
🌙 The sky over 61730 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population361This ZIP361
Households149This ZIP149
Housing units172This ZIP172
Median age50.1This ZIP50.1Illinois39.0US 38.9
Median household income$76,719This ZIP$76,719Illinois$83,390US $80,734
Median home value$160,600This ZIP$160,600Illinois$263,300US $332,700
Median gross rent$935This ZIP$935Illinois$1,274US $1,413
Bachelor's degree or higher18.9%This ZIP18.9%
Mean commute27.2 minThis ZIP27.2 min
Population density12.5 / sq miThis ZIP12.5 / sq mi

Business and tax activity

Business establishments8This ZIP8
Employees233This ZIP233
Annual payroll$31,037,000This ZIP$31,037,000
Tax returns filed180This ZIP180
Total adjusted gross income$11,876,000This ZIP$11,876,000

Land area

Land area28.96 sq miThis ZIP28.96 sq mi
Water area0.00 sq mi

Other place names in 61730

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

ZIP codes near 61730

ZIPCityDistance
61758 Merna, IL 4.9 mi
61737 Ellsworth, IL 5.3 mi
61728 Colfax, IL 6.8 mi
61702 Bloomington, IL 6.9 mi
61791 Bloomington, IL 6.9 mi
61753 Lexington, IL 7.3 mi
61776 Towanda, IL 7.6 mi
61722 Arrowsmith, IL 9.4 mi
61736 Downs, IL 10.6 mi
61799 Bloomington, IL 11.2 mi

Find every ZIP code within 10 miles of 61730 →

Questions about this ZIP code

Where is ZIP code 61730?

61730 is in Cooksville, Illinois, in McLean County, part of the Bloomington, IL metropolitan area. Its published point location is 40.5326, -88.7344.

What county is 61730 in?

61730 lies in McLean County.

What area code is 61730?

Cooksville uses area code 309, from NANPA's telephone records.

What time zone is 61730 in?

61730 uses America/Chicago.

How many people live in 61730?

About 361 people live in ZIP code 61730, in 149 households, at 12.5 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 61730?

$76,719 a year, against $83,390 across Illinois.

What ZIP codes are near 61730?

The closest are 61758 (4.9 mi), 61737 (5.3 mi), 61728 (6.8 mi), 61702 (6.9 mi) and 61791 (6.9 mi).

Is 61730 a PO Box ZIP code?

61730 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “61730 ZIP Code — Cooksville, Illinois (McLean County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/61730

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/61730.json

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