O Fallon, MO 63366 ZIP Code Profile


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ZIP Code 63366: Basic Data & USPS Preferred City Name

Preferred Name, USPS
O Fallon, MO 63366

Acceptable Alternative
Cottleville, MO 63366
Dardenne Pr, MO 63366
Dardenne Prairie, MO 63366
Saint Paul, MO 63366
Saint Peters, MO 63366

Not Acceptable, USPS
Dardenne, MO 63366
Ofallon, MO 63366
St Peters, MO 63366

  • ZIP Code Type: STANDARD
  • County: Saint Charles County
  • Centroid: Latitude 38.835, Longitude -90.742
  • Time Zone: Central Time Zone (UTC -6 hours)
  • Observes DST: Yes
  • Businesses Addresses: 1,385
  • PO Box Addresses: 332
  • Residential Addresses: 19,894
    • Multi-Family Addresses: 1,220
    • Single Family Addresses: 18,674

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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63366 ZIP Code Map

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O Fallon, MO 63366 Data & Demographics (As of July 1, 2017)


Total Population 51,987
Daytime Population: Workers 17,722
Daytime Population: Residents 24,755
Total Daytime Population (TDP) 42,477
Ratio TDP/Total Population1 0.82
Population in Households 51,867
Population in Familes 44,305
Population in Group Qrtrs 120
Population Density2 699
Diversity Index3 25


Median Household Income $70,603
Average Household Income $84,894
Per Capita Income $31,492


Total Housing Units 20,004 (100%)
Owner Occupied HU 15,326 (76.6%)
Renter Occupied HU 3,930 (19.6%)
Vacant Housing Units 748 ( 3.7%)
Median Home Value $197,857
Average Home Value $222,773


Total Households 19,256
Average Household Size 2.69
Family Households 14,147
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 1.5% 1.56%
Households 1.58% 1.61%
Families 1.46% 1.51%
Median Household Income   2.27%
Per Capita Income   2.79%

O Fallon, MO 63366 - Peer Comparisons by Rank and Percentile

The table below compares 63366 to the other 1,012 ZIP Codes in Missouri 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 # 6 100th
Population Density # 145 86th
Diversity Index # 208 79th
Median Household Income # 62 94th
Per Capita Income # 113 89th

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

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