Irwin, IA 51446 ZIP Code Profile

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Irwin, IA

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ZIP Code 51446: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Irwin, IA 51446

  • ZIP Code Type: STANDARD
  • County: Shelby County
  • Centroid: Latitude 41.791, Longitude -95.21
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes
  • Businesses Addresses: 17
  • PO Box Addresses: 128
  • Residential Addresses: 114
    • Multi-Family Addresses: 0
    • Single Family Addresses: 114

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

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51446 ZIP Code Map

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Irwin, IA 51446 Data & Demographics (As of July 1, 2017)


Total Population 501
Daytime Population: Workers 151
Daytime Population: Residents 232
Total Daytime Population (TDP) 383
Ratio TDP/Total Population1 0.76
Population in Households 501
Population in Familes 418
Population in Group Qrtrs 0
Population Density2 12
Diversity Index3 7


Median Household Income $45,602
Average Household Income $55,975
Per Capita Income $26,479


Total Housing Units 274 (100%)
Owner Occupied HU 184 (67.2%)
Renter Occupied HU 53 (19.3%)
Vacant Housing Units 37 (13.5%)
Median Home Value $102,174
Average Home Value $144,429


Total Households 237
Average Household Size 2.11
Family Households 163
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood 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.


2010-2017 2017-2022
Population -0.43% -0.32%
Households -0.29% -0.25%
Families -0.42% -0.37%
Median Household Income   3.76%
Per Capita Income   3.36%

Irwin, IA 51446 - Peer Comparisons by Rank and Percentile

The table below compares 51446 to the other 963 ZIP Codes in Iowa by rank and percentile using July 1, 2017 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 # 695 28th
Population Density # 760 21st
Diversity Index # 732 25th
Median Household Income # 828 14th
Per Capita Income # 628 35th

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

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