Alton, IA 51003 ZIP Code Profile

Related Place Profiles:
Alton, IA | Carnes, IA

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ZIP Code 51003: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Alton, IA 51003

Not Acceptable, USPS
Carnes, IA 51003

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 54
  • Single Family Addresses: 485
  • Multi-Family Addresses: 0
  • County: Sioux County
  • Centroid: Latitude 42.988, Longitude -96.011
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes

Neighborhood Data

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51003 ZIP Code Map

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Alton, IA 51003 Data & Demographics (As of July 1, 2016)


Total Population 1,865
Population in Households 1,864
Population in Familes 1,603
Population in Group Qrtrs 1
Population Density1 33
Diversity Index2 18


Total Households 721
Average Household Size 2.59
Family Households 521
Average Family Size 3


Total Housing Units 751 (100%)
Owner Occupied HU 584 (77.8%)
Renter Occupied HU 137 (18.2%)
Vacant Housing Units 30 ( 4.0%)
Median Home Value $144,545
Average Home Value $177,697


Median Household Income $57,571
Average Household Income $68,251
Per Capita Income $26,387
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.41% 1.16%
Households 1.47% 1.22%
Families 1.35% 1.13%
Median Household Income   2.49%
Per Capita Income   2.01%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Alton, IA 51003 - Peer Comparisons by Rank and Percentile

The table below compares 51003 to the other 963 ZIP Codes in Iowa by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 303 69th
Population Density1 # 353 64th
Diversity Index2 # 184 81st
Median Household Income # 277 71st
Per Capita Income # 579 40th

Additional comparisons and rankings can be made with a VERY EASY TO USE Iowa Census Data Comparison Tool.

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