Onawa, IA 51040 ZIP Code Profile

Related Place Profiles:
Onawa, IA | Turin, IA

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ZIP Code 51040: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Onawa, IA 51040

Acceptable Alternative
Turin, IA 51040

  • ZIP Code Type: STANDARD
  • County: Monona County
  • Centroid: Latitude 42.029, Longitude -96.098
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes
  • Businesses Addresses: 171
  • PO Box Addresses: 68
  • Residential Addresses: 1,576
    • Multi-Family Addresses: 97
    • Single Family Addresses: 1,479

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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51040 ZIP Code Map

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Onawa, IA 51040 Data & Demographics (As of July 1, 2017)


Total Population 3,587
Daytime Population: Workers 1,849
Daytime Population: Residents 1,998
Total Daytime Population (TDP) 3,847
Ratio TDP/Total Population1 1.07
Population in Households 3,517
Population in Familes 2,646
Population in Group Qrtrs 70
Population Density2 22
Diversity Index3 12


Median Household Income $42,604
Average Household Income $54,167
Per Capita Income $24,066


Total Housing Units 1,879 (100%)
Owner Occupied HU 1,061 (56.5%)
Renter Occupied HU 519 (27.6%)
Vacant Housing Units 299 (15.9%)
Median Home Value $88,326
Average Home Value $110,462


Total Households 1,580
Average Household Size 2.23
Family Households 904
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 -0.27% -0.21%
Households -0.41% -0.29%
Families -0.64% -0.4%
Median Household Income   3.49%
Per Capita Income   2.67%

Onawa, IA 51040 - Peer Comparisons by Rank and Percentile

The table below compares 51040 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 # 170 82nd
Population Density # 474 51st
Diversity Index # 357 63rd
Median Household Income # 904 6th
Per Capita Income # 838 13th

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

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