ZIP Code 51003 - Alton Iowa

ZIP Code 51003 is located in Alton Iowa. Portions of 51003 are also in Orange City and Nassau Township and Holland Township and Floyd Township (Sioux County) and East Orange Township. 51003 is entirely within Sioux County. Regionally, 51003 is located in the Sioux City Area.

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ZIP Code 51003 Quick Stats

ZIP Code NameAlton
Primary CountySioux County
ZIP Code TypeStandard
Population (2022)1,761
Area Code(s)712
Current Time
CDT

ZIP Code 51003 Map

51003 Demographics

51003 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in Iowa based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 51003 is White. The majority race/ethnicity attending public schools in 51003 is White. The current unemployment level in 51003 is 2.2%.

Population1,761
Population Growth Rate-1.65%
Population Density34 People per Square Mile
Total Households626
Percentage High Income Households1.3%
Median Household Income (2021)$88,487
Average Adjusted Gross Income (2021)$412,430
Current Unemployment Rate (June 2024)2.2%
Majority Race/EthnictyWhite - 91.30%
Public School Majority Race/EthnictyWhite - 74.37%

51003 Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White1,64791.3%
Black60.33%
Hispanic1347.43%
Asian170.94%
Native American00%
Hawaiian/Pac. Islander00%

51003 Public School Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White26776.07%
Black92.56%
Hispanic7019.94%
Asian51.42%
Native American00%
Hawaiian/Pac. Islander00%

51003 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College706.76%
Bachelor Degree12612.16%
High School Diploma43041.51%
No High School Diploma50.48%
GED or Alternate393.76%
1 or More Years of College15414.86%
Associates Degree13412.93%
Masters Degree656.27%
Professional Degree70.68%
Doctorate Degree60.58%

51003 Geography

Coordinates42.98492050,-95.98606110
Adjacent ZIP Codes
Cities/Towns in 51003
RegionSioux City Area
Time ZoneCentral Daylight Time
IANA TimezoneAmerica/Chicago
Area51 Square Miles

51003 Politics

US Congressional Districts in 51003
Iowa State Senate Districts in 51003
Iowa State House of Representatives Districts in 51003

51003 Weather and Climate Data

Plant Hardiness ZoneZone 5a: -20F to -15F
Average First Frost DateOctober 1 - 10
Average Last Frost DateMay 1 - 10
Koppen-Geiger Climate ZoneDfa - Humid Continental Hot Summers
Ecoregion47a - Loess Prairies

51003 Annual Climate Data

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)5122435485761594937231035
Avg Max Temp (°F)25324560738285837663432958
Avg Precip (In.).68.611.962.793.454.213.713.392.581.991.52.827.69

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