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 — CITY/IA/CRYSTAL-LAKE

Crystal Lake ZIP code, Iowa

The ZIP code for Crystal Lake, IA is 50432, and its area code is 641.

USPS city name
1 ZIP code
Population
283
Area code
641
State
Iowa

Crystal Lake in numbers

About 283 people live in Crystal Lake, in 134 households. The median household income is $66,875 a year, 11% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $100,300 (52% below the Iowa median), and median gross rent is $911 a month. The median age is 33.9; 9.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 37 minutes.

Population283Crystal Lake283
Households134Crystal Lake134
Median age33.9Crystal Lake33.9Iowa38.6US 38.9
Median household income$66,875Crystal Lake$66,875Iowa$75,059US $80,734
Median home value$100,300Crystal Lake$100,300Iowa$208,000US $332,700
Median gross rent$911Crystal Lake$911Iowa$972US $1,413
Bachelor's degree or higher9.4%Crystal Lake9.4%Iowa31.4%US 35.7%
Mean commute36.6 minCrystal Lake36.6 minIowa19.8 minUS 26.4 min
Population density1,141 / sq miCrystal Lake1,141 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Crystal Lake city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Crystal Lake

ZIP codes with the USPS city name Crystal Lake
ZIP City Type Population Median income Median home
50432 Crystal Lake , IA Standard 283 $66,875 $100,300

Map of Crystal Lake ZIP codes

50432

The ZIP codes of Crystal Lake, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Crystal Lake

The nearest larger towns are Forest City (4,290 people, 8.2 mi), Britt (1,882 people, 8.6 mi) and Thompson (459 people, 10 mi).

Towns near Crystal Lake
TownPopulationDistance
Forest City 4,290 8.2 mi
Garner 3,049 12.8 mi
Clear Lake 7,607 22.0 mi
Algona 5,377 24.3 mi
Belmond 2,694 27.6 mi

More nearby: every ZIP code in Hancock County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Crystal Lake, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/crystal-lake

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