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/50623

50623

ZIP 50623 is Dewar, Iowa, in Black Hawk County; area code 319; Central time.

Type
Standard
Time zone
America/Chicago
County
Black Hawk
Population
153
Coordinates
42.5269, -92.2097
☼ Live from 50623 — Dewar, IA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 50623 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 50623
  • 🔢 Type 50623 into a pocket calculator and turn it upside down: EZgOS — not quite a word, sorry.
  • ➕ As a number, 50,623 = 23 × 31 × 71. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100010110111111
  • 🏠 Its numerical neighbours: 50622 (Denver, IA, 12 mi away) and 50624 (Dike, IA, 23 mi away).
  • 🔄 Backwards, 50623 becomes 32605 — and that is a real ZIP code: Gainesville, FL, 1,042 miles away.
  • 👥 70 other ZIP codes are made of exactly the same digits (02356, 02536, 02563, 02635, 02653, 03256, …). The farthest-flung twin is 02653 in Orleans, MA, 1,137 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther west than 61%.
  • 🎯380 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 50623 and you would come out at 42.53°S, 87.79°E — 964 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 03m.
  • 📏 At 2.1 square miles of land, 50623 is bigger than 12% of ZIP codes — room for about 1.6 Central Parks.
🌙 The sky over 50623 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population153This ZIP153
Households66This ZIP66
Housing units66This ZIP66
Median age60.0This ZIP60.0Iowa38.6US 38.9
Median household income$93,750This ZIP$93,750Iowa$75,059US $80,734
Median home value$170,800This ZIP$170,800Iowa$208,000US $332,700
Bachelor's degree or higher3.2%This ZIP3.2%
Mean commute29.8 minThis ZIP29.8 min
Population density74.0 / sq miThis ZIP74.0 / sq mi

Business and tax activity

Business establishments3This ZIP3
Employees54This ZIP54
Annual payroll$2,544,000This ZIP$2,544,000

Land area

Land area2.07 sq miThis ZIP2.07 sq mi
Water area0.00 sq mi

ZIP codes near 50623

ZIPCityDistance
50667 Raymond, IA 4.0 mi
50703 Waterloo, IA 4.2 mi
50626 Dunkerton, IA 4.4 mi
50707 Evansdale, IA 5.0 mi
50614 Cedar Falls, IA 6.4 mi
50704 Waterloo, IA 6.4 mi
50702 Waterloo, IA 7.0 mi
50634 Gilbertville, IA 7.5 mi
50648 Jesup, IA 7.8 mi
50701 Waterloo, IA 10.2 mi

Find every ZIP code within 10 miles of 50623 →

Questions about this ZIP code

Where is ZIP code 50623?

50623 is in Dewar, Iowa, in Black Hawk County, part of the Waterloo-Cedar Falls, IA metropolitan area. Its published point location is 42.5269, -92.2097.

What county is 50623 in?

50623 lies in Black Hawk County.

What area code is 50623?

Dewar uses area code 319, from NANPA's telephone records.

What time zone is 50623 in?

50623 uses America/Chicago.

How many people live in 50623?

About 153 people live in ZIP code 50623, in 66 households, at 74.0 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 50623?

$93,750 a year, against $75,059 across Iowa.

What ZIP codes are near 50623?

The closest are 50667 (4 mi), 50703 (4.2 mi), 50626 (4.4 mi), 50707 (5 mi) and 50614 (6.4 mi).

Is 50623 a PO Box ZIP code?

50623 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “50623 ZIP Code — Dewar, Iowa (Black Hawk County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50623

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/50623.json

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