Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — CITY/IA/SPENCER

Spencer ZIP code, Iowa

The ZIP code for Spencer, IA is 51301, and its area code is 712.

USPS city name
1 ZIP code
Population
11,400
Area code
712
State
Iowa

Spencer in numbers

About 11,400 people live in Spencer, in 5,201 households, the 36th-largest of Iowa's 1,017 census places. The median household income is $59,667 a year, 21% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $184,800 (11% below the Iowa median), and median gross rent is $805 a month. The median age is 41.4; 29.8% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 16 minutes.

Population11,400Spencer11,400
Households5,201Spencer5,201
Median age41.4Spencer41.4Iowa38.6US 38.9
Median household income$59,667Spencer$59,667Iowa$75,059US $80,734
Median home value$184,800Spencer$184,800Iowa$208,000US $332,700
Median gross rent$805Spencer$805Iowa$972US $1,413
Bachelor's degree or higher29.8%Spencer29.8%Iowa31.4%US 35.7%
Mean commute15.8 minSpencer15.8 minIowa19.8 minUS 26.4 min
Population density1,041 / sq miSpencer1,041 / sq mi

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

ZIP codes addressed as Spencer

ZIP codes with the USPS city name Spencer
ZIP City Type Population Median income Median home
51301 Spencer , IA Standard 12,638 $63,402 $188,300

Map of Spencer ZIP codes

51301

The ZIP codes of Spencer, 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 Spencer

The nearest larger towns are Storm Lake (11,428 people, 35 mi), Worthington, MN (13,780 people, 40 mi) and Fort Dodge (24,827 people, 66 mi).

Towns near Spencer
TownPopulationDistance
Milford 3,311 13.5 mi
Spirit Lake 5,518 18.7 mi
Estherville 5,839 23.7 mi
Emmetsburg 3,648 24.0 mi

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

Cite this page

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

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