ZIP Code Tabulation Area · Iowa

ZIP Code 51103: Sioux City, IA

ZIP Code 51103 (Sioux City, Woodbury County, Iowa) has an estimated 16,895 residents in 6,402 households. The median household income is $58,197, the median home value is $142,900 and the median gross rent is $906/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

Total population

16,895

Margin of error ±987

Median household income

$58,197

Margin of error ±$5,883

Median home value

$142,900

Margin of error ±$13,575

Median gross rent

$906/mo

Margin of error ±$84

Median age

35.5 yrs

Margin of error ±2.3 yrs

Mean travel time to work

21.1 min

Margin of error ±5.5 min

How ZIP 51103 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 5110335.5 yrsIowa38.6 yrsUnited States38.9 yrs

Median household income

ZIP 51103$58,197Iowa$75,059United States$80,734

Per capita income

ZIP 51103$27,717Iowa$40,877United States$44,673

Poverty rate

ZIP 5110321.0%Iowa11.1%United States12.5%

Unemployment rate

ZIP 511033.4%Iowa3.6%United States5.2%

Bachelor's degree or higher

ZIP 5110318.0%Iowa31.4%United States35.7%

Median home value

ZIP 51103$142,900Iowa$208,000United States$332,700

Median gross rent

ZIP 51103$906/moIowa$972/moUnited States$1,413/mo

Owner-occupied homes

ZIP 5110365.6%Iowa71.7%United States65.2%

Mean travel time to work

ZIP 5110321.1 minIowa19.8 minUnited States26.4 min

Worked from home

ZIP 511035.5%Iowa11.3%United States15.1%

All figures for ZIP 51103

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 51103 — ACS 2020–2024 5-year estimates
MeasureZIP 51103Margin of errorIowaUnited States
Total population16,895±9873,210,507334,922,499
Median age35.5 yrs±2.3 yrs38.6 yrs38.9 yrs
Households6,402±4331,315,707129,227,496
Median household income$58,197±$5,883$75,059$80,734
Per capita income$27,717±$2,052$40,877$44,673
Poverty rate21.0%±4.0 pts11.1%12.5%
Unemployment rate3.4%±1.5 pts3.6%5.2%
Bachelor's degree or higher18.0%±3.2 pts31.4%35.7%
Median home value$142,900±$13,575$208,000$332,700
Median gross rent$906/mo±$84$972/mo$1,413/mo
Owner-occupied homes65.6%±3.7 pts71.7%65.2%
Mean travel time to work21.1 min±5.5 min19.8 min26.4 min
Worked from home5.5%±2.6 pts11.3%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 51103
GroupZIP 51103IowaUnited States
White alone, not Hispanic or Latino49.9%82.3%57.4%
Black or African American alone, not Hispanic or Latino4.7%3.8%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino1.3%0.2%0.5%
Asian alone, not Hispanic or Latino2.9%2.5%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.2%0.2%
Some other race alone, not Hispanic or Latino0.7%0.3%0.6%
Two or more races, not Hispanic or Latino3.5%3.5%4.3%
Hispanic or Latino (of any race)36.9%7.3%19.3%

Where ZIP 51103 is

State
Iowa
Main county
Woodbury County
Largest overlapping place
Sioux City (100% of the ZIP's land area)
Land area
12.06 sq mi· about 1,401 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 Woodbury County

51004 Woodbury County, IA51007 Woodbury County, IA51015 Climbing Hill, IA51016 Woodbury County, IA51019 Woodbury County, IA51026 Woodbury County, IA51030 Woodbury County, IA51039 Woodbury County, IA51044 Woodbury County, IA51048 Woodbury County, IA51052 Woodbury County, IA51054 Woodbury County, IA51055 Woodbury County, IA51056 Woodbury County, IA51101 Sioux City, IA51104 Sioux City, IA51105 Sioux City, IA51106 Sioux City, IA51111 Sioux City, IA

See every ZIP code in Iowa, or compare ZIP 51103 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.