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/WATERLOO

Waterloo ZIP codes, Iowa

Waterloo, IA has 4 ZIP codes (50701, 50702, 50703 and 50704) and area code 319. The largest is 50701.

USPS city name
4 ZIP codes
Overlapping the city
2 more
Population
67,008
Area code
319
State
Iowa

Mail addressed to Waterloo uses the ZIP codes above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Waterloo in numbers

About 67,008 people live in Waterloo, in 29,283 households, the 9th-largest of Iowa's 1,017 census places. The median household income is $57,480 a year, 23% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $152,600 (27% below the Iowa median), and median gross rent is $923 a month. The median age is 36.7; 21.8% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 16 minutes.

Population67,008Waterloo67,008
Households29,283Waterloo29,283
Median age36.7Waterloo36.7Iowa38.6US 38.9
Median household income$57,480Waterloo$57,480Iowa$75,059US $80,734
Median home value$152,600Waterloo$152,600Iowa$208,000US $332,700
Median gross rent$923Waterloo$923Iowa$972US $1,413
Bachelor's degree or higher21.8%Waterloo21.8%Iowa31.4%US 35.7%
Mean commute15.9 minWaterloo15.9 minIowa19.8 minUS 26.4 min
Population density1,088 / sq miWaterloo1,088 / sq mi

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

ZIP codes addressed as Waterloo

ZIP codes with the USPS city name Waterloo
ZIP City Type Population Median income Median home
50701 Waterloo , IA Standard 30,232 $61,475 $183,800
50702 Waterloo , IA Standard 20,882 $62,021 $150,500
50703 Waterloo , IA Standard 17,952 $50,060 $95,900
50704 Waterloo , IA No street area — — —

Other ZIP codes overlapping Waterloo

These ZIP codes cover part of Waterloo but are addressed as somewhere else.

ZIP codes overlapping Waterloo
ZIP City Type Population Median income Median home
50613 Cedar Falls , IA Standard 43,867 $78,503 $270,800
50707 Evansdale , IA Standard 7,784 $63,441 $153,700

Map of Waterloo ZIP codes

50701507025070350704

The ZIP codes of Waterloo, 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 Waterloo

The nearest larger towns are Cedar Rapids (137,264 people, 50 mi), Iowa City (75,752 people, 72 mi) and Ames (67,669 people, 72 mi).

Towns near Waterloo
TownPopulationDistance
Evansdale 4,518 4.6 mi
Cedar Falls 40,888 5.5 mi
Hudson 2,699 6.4 mi
Jesup 2,561 14.6 mi
Waverly 10,494 17.0 mi
Independence 6,164 23.0 mi
Grundy Center 2,809 23.3 mi
Oelwein 5,834 25.5 mi
Vinton 4,948 28.2 mi

More nearby: every ZIP code in Black Hawk County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Waterloo, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/waterloo

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