ZIP Code Tabulation Area · Iowa

ZIP Code 52568: Martinsburg, IA

ZIP Code 52568 (Martinsburg, Keokuk County, Iowa) has an estimated 80 residents in 33 households. The median household income is $44,375, the median home value is $66,300 and the median gross rent is —. 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

Some estimates have a large margin of error. 7 figures for this ZIP (poverty rate, unemployment, bachelor's or higher, home value, owner-occupied, commute, work from home) are marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

Margin of error ±34

Median household income

$44,375

Margin of error ±$21,773

Median home value

$66,300*

Margin of error ±$49,224· estimate has a large margin of error

Median gross rent

—

Margin of error not available

Median age

52.5 yrs

Margin of error ±18.2 yrs

Mean travel time to work

33.3 min*

Margin of error ±27.5 min· estimate has a large margin of error

How ZIP 52568 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 5256852.5 yrsIowa38.6 yrsUnited States38.9 yrs

Median household income

ZIP 52568$44,375Iowa$75,059United States$80,734

Per capita income

ZIP 52568$21,354Iowa$40,877United States$44,673

Poverty rate

ZIP 5256831.3%*Iowa11.1%United States12.5%

Unemployment rate

ZIP 525680.0%*Iowa3.6%United States5.2%

Bachelor's degree or higher

ZIP 525683.1%*Iowa31.4%United States35.7%

Median home value

ZIP 52568$66,300*Iowa$208,000United States$332,700

Median gross rent

ZIP 52568—Iowa$972/moUnited States$1,413/mo

Owner-occupied homes

ZIP 5256881.8%*Iowa71.7%United States65.2%

Mean travel time to work

ZIP 5256833.3 min*Iowa19.8 minUnited States26.4 min

Worked from home

ZIP 5256821.2%*Iowa11.3%United States15.1%

All figures for ZIP 52568

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 52568 — ACS 2020–2024 5-year estimates
Measure	ZIP 52568	Margin of error	Iowa	United States
Total population	80	±34	3,210,507	334,922,499
Median age	52.5 yrs	±18.2 yrs	38.6 yrs	38.9 yrs
Households	33	±14	1,315,707	129,227,496
Median household income	$44,375	±$21,773	$75,059	$80,734
Per capita income	$21,354	±$5,415	$40,877	$44,673
Poverty rate	31.3%*	±22.6 pts	11.1%	12.5%
Unemployment rate	0.0%*	±30.3 pts	3.6%	5.2%
Bachelor's degree or higher	3.1%*	±27.7 pts	31.4%	35.7%
Median home value	$66,300*	±$49,224	$208,000	$332,700
Median gross rent	—	—	$972/mo	$1,413/mo
Owner-occupied homes	81.8%*	±24.4 pts	71.7%	65.2%
Mean travel time to work	33.3 min*	±27.5 min	19.8 min	26.4 min
Worked from home	21.2%*	±25.3 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 52568
Group	ZIP 52568	Iowa	United States
White alone, not Hispanic or Latino	87.5%	82.3%	57.4%
Black or African American alone, not Hispanic or Latino	0.0%	3.8%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.2%	0.5%
Asian alone, not Hispanic or Latino	0.0%	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	0.0%	3.5%	4.3%
Hispanic or Latino (of any race)	12.5%	7.3%	19.3%

Where ZIP 52568 is

State: Iowa
Main county: Keokuk County
Largest overlapping place: Martinsburg (100% of the ZIP's land area)
Land area: 0.26 sq mi· about 308 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 Keokuk County

50104 Keokuk County, IA 50136 Keokuk County, IA 50255 Thornburg, IA 50268 Keokuk County, IA 52231 Keokuk County, IA 52335 Keokuk County, IA 52355 Keokuk County, IA 52550 Keokuk County, IA 52562 Hayesville, IA 52563 Keokuk County, IA 52576 Keokuk County, IA 52585 Keokuk County, IA 52591 Keokuk County, IA

See every ZIP code in Iowa, or compare ZIP 52568 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.