ZIP Code Tabulation Area · Iowa

ZIP Code 51301: Clay County, IA

ZIP Code 51301 (Clay County, Iowa) has an estimated 12,638 residents in 5,680 households. The median household income is $63,402, the median home value is $188,300 and the median gross rent is $807/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

12,638

Margin of error ±274

Median household income

$63,402

Margin of error ±$6,029

Median home value

$188,300

Margin of error ±$11,031

Median gross rent

$807/mo

Margin of error ±$93

Median age

41.8 yrs

Margin of error ±1.2 yrs

Mean travel time to work

16.2 min

Margin of error ±2.7 min

How ZIP 51301 compares with Iowa and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 5130141.8 yrsIowa38.6 yrsUnited States38.9 yrs

Median household income

ZIP 51301$63,402Iowa$75,059United States$80,734

Per capita income

ZIP 51301$37,984Iowa$40,877United States$44,673

Poverty rate

ZIP 5130113.1%Iowa11.1%United States12.5%

Unemployment rate

ZIP 513014.0%Iowa3.6%United States5.2%

Bachelor's degree or higher

ZIP 5130129.0%Iowa31.4%United States35.7%

Median home value

ZIP 51301$188,300Iowa$208,000United States$332,700

Median gross rent

ZIP 51301$807/moIowa$972/moUnited States$1,413/mo

Owner-occupied homes

ZIP 5130170.3%Iowa71.7%United States65.2%

Mean travel time to work

ZIP 5130116.2 minIowa19.8 minUnited States26.4 min

Worked from home

ZIP 513016.4%Iowa11.3%United States15.1%

All figures for ZIP 51301

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 51301 — ACS 2020–2024 5-year estimates
Measure	ZIP 51301	Margin of error	Iowa	United States
Total population	12,638	±274	3,210,507	334,922,499
Median age	41.8 yrs	±1.2 yrs	38.6 yrs	38.9 yrs
Households	5,680	±214	1,315,707	129,227,496
Median household income	$63,402	±$6,029	$75,059	$80,734
Per capita income	$37,984	±$2,735	$40,877	$44,673
Poverty rate	13.1%	±2.5 pts	11.1%	12.5%
Unemployment rate	4.0%	±2.2 pts	3.6%	5.2%
Bachelor's degree or higher	29.0%	±4.0 pts	31.4%	35.7%
Median home value	$188,300	±$11,031	$208,000	$332,700
Median gross rent	$807/mo	±$93	$972/mo	$1,413/mo
Owner-occupied homes	70.3%	±4.2 pts	71.7%	65.2%
Mean travel time to work	16.2 min	±2.7 min	19.8 min	26.4 min
Worked from home	6.4%	±2.2 pts	11.3%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 51301
Group	ZIP 51301	Iowa	United States
White alone, not Hispanic or Latino	90.7%	82.3%	57.4%
Black or African American alone, not Hispanic or Latino	0.3%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.2%	0.2%	0.5%
Asian alone, not Hispanic or Latino	0.8%	2.5%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.2%	0.2%
Some other race alone, not Hispanic or Latino	0.0%	0.3%	0.6%
Two or more races, not Hispanic or Latino	2.7%	3.5%	4.3%
Hispanic or Latino (of any race)	5.3%	7.3%	19.3%

Where ZIP 51301 is

State: Iowa
Main county: Clay County
Largest overlapping place: Spencer (7% of the ZIP's land area)
Land area: 157.67 sq mi· about 80 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Clay County

51033 Clay County, IA 51047 Clay County, IA 51333 Clay County, IA 51338 Clay County, IA 51340 Fostoria, IA 51341 Gillett Grove, IA 51343 Clay County, IA 51357 Clay County, IA 51366 Clay County, IA

See every ZIP code in Iowa, or compare ZIP 51301 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.