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/52305

52305

ZIP 52305 is Martelle, Iowa, mostly in Jones County; area code 319; Central time.

Type
Standard
Time zone
America/Chicago
County
Jones +1 more
Metro area
Cedar Rapids, IA
Population
913
Coordinates
42.0180, -91.3421
☼ Live from 52305 — Martelle, IA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 52305 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 52305
  • 🔢 Type 52305 into a pocket calculator and turn it upside down: SOEZS — not quite a word, sorry.
  • ➕ As a number, 52,305 = 3 × 5 × 11 × 317. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100110001010001
  • 🏠 Its numerical neighbours: 52302 (Marion, IA, 12 mi away) and 52306 (Mechanicsville, IA, 10 mi away).
  • 🔄 Backwards, 52305 becomes 50325 — and that is a real ZIP code: Clive, IA, 130 miles away.
  • 👥 39 other ZIP codes are made of exactly the same digits (02355, 02535, 02553, 03255, 05253, 05352, …). The farthest-flung twin is 02553 in Monument Beach, MA, 1,064 miles away.
  • 🧭 Farther north than 75% of all ZIP codes, and farther west than 60%.
  • 🎯407 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 52305 and you would come out at 42.02°S, 88.66°E — 1,020 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 15m of daylight. Shortest: 9h 07m.
  • 📏 At 27.1 square miles of land, 52305 is bigger than 43% of ZIP codes — room for about 21 Central Parks.
🌙 The sky over 52305 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population913This ZIP913
Households315This ZIP315
Housing units315This ZIP315
Median age33.6This ZIP33.6Iowa38.6US 38.9
Median household income$94,452This ZIP$94,452Iowa$75,059US $80,734
Median home value$165,000This ZIP$165,000Iowa$208,000US $332,700
Median gross rent$825This ZIP$825Iowa$972US $1,413
Bachelor's degree or higher26.7%This ZIP26.7%
Mean commute27.8 minThis ZIP27.8 min
Population density33.6 / sq miThis ZIP33.6 / sq mi

Business and tax activity

Business establishments10This ZIP10
Employees51This ZIP51
Annual payroll$2,025,000This ZIP$2,025,000
Tax returns filed300This ZIP300
Total adjusted gross income$23,980,000This ZIP$23,980,000

Land area

Land area27.14 sq miThis ZIP27.14 sq mi
Water area0.00 sq mi

Counties 52305 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Jones County 78.1%
Linn County 21.9%

Other place names in 52305

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

ZIP codes near 52305

ZIPCityDistance
52312 Morley, IA 5.0 mi
52336 Springville, IA 6.4 mi
52205 Anamosa, IA 7.3 mi
52314 Mount Vernon, IA 7.9 mi
52253 Lisbon, IA 8.5 mi
52320 Olin, IA 10.0 mi
52306 Mechanicsville, IA 10.1 mi
52302 Marion, IA 11.7 mi
52403 Cedar Rapids, IA 12.0 mi
52252 Langworthy, IA 13.7 mi

Find every ZIP code within 10 miles of 52305 →

Questions about this ZIP code

Where is ZIP code 52305?

52305 is in Martelle, Iowa, in Jones County, part of the Cedar Rapids, IA metropolitan area. Its published point location is 42.0180, -91.3421.

What county is 52305 in?

52305 spans 2 counties: Jones County and Linn County. Most of it falls in Jones County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 52305?

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

What time zone is 52305 in?

52305 uses America/Chicago.

How many people live in 52305?

About 913 people live in ZIP code 52305, in 315 households, at 33.6 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 52305?

$94,452 a year, against $75,059 across Iowa.

What ZIP codes are near 52305?

The closest are 52312 (5 mi), 52336 (6.4 mi), 52205 (7.3 mi), 52314 (7.9 mi) and 52253 (8.5 mi).

Is 52305 a PO Box ZIP code?

52305 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “52305 ZIP Code — Martelle, Iowa (Jones County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/52305

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/52305.json

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