O Fallon, MO 63366 ZIP Code Profile


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: 1,397
  • PO Box Addresses: 331
  • Residential Addresses: 19,889
    • Multi-Family Addresses: 1,257
    • Single Family Addresses: 18,632

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

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O Fallon, MO 63366 Data & Demographics (As of July 1, 2018)


Total Population 53,164
Population in Households 53,047
Population in Familes 45,254
Population in Group Qrtrs 117
Population Density1 762
Diversity Index2 25


Median Household Income $75,181
Average Household Income $89,622
Per Capita Income $33,175


Total Housing Units 20,349 (100%)
Owner Occupied HU 16,271 (80.0%)
Renter Occupied HU 3,382 (16.6%)
Vacant Housing Units 696 ( 3.4%)
Median Home Value $202,856
Average Home Value $230,272


Total Households 19,653
Average Household Size 2.7
Family Households 14,464
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 1.68% 1.71%
Households 1.72% 1.74%
Families 1.64% 1.67%
Median Household Income   1.87%
Per Capita Income   3.0%

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

The table below compares 63366 to the other 1,009 ZIP Codes in Missouri by rank and percentile using July 1, 2018 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 # 133 87th
Diversity Index # 207 80th
Median Household Income # 61 94th
Per Capita Income # 105 90th

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

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