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ZIP Code 63366 - O'Fallon Missouri

Overview

ZIP Code 63366 is located in O'Fallon Missouri. Portions of 63366 are also in St. Paul and Dardenne Prairie and Josephville and Wentzville and St. Peters and Wentzville Township and Rivers Township and Lake St. Louis Township and O'Fallon Township and Dardenne Township and Weldon Spring Township. 63366 is entirely within Saint Charles County. Regionally, 63366 is located in Metro St. Louis.

ZIP Code 63366 Quick Stats

ZIP Code NameO'Fallon
Primary CountySaint Charles County
ZIP Code TypeStandard
Population (2022)52,746
Area Code(s)636
Current Time
CDT

ZIP Code 63366 Map

Map of ZIP Code 63366 in O'Fallon, MO — click to open interactive map

63366 Demographics

63366 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in Missouri based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 63366 is White. The majority race/ethnicity attending public schools in 63366 is White. The current unemployment level in 63366 is 4.2%.

Population52,746
Population Growth Rate5.95%
Population Density705 People per Square Mile
Total Households17,106
Percentage High Income Households2.5%
Median Household Income (2021)$84,414
Average Adjusted Gross Income (2021)$407,770
Current Unemployment Rate (May 2026)4.2%
Sales Tax Rate (2025)8.9%
Majority Race/EthnicityWhite - 89.49%
Public School Majority Race/EthnicityWhite - 79.37%

63366 Race/Ethnicity Breakdown

Race/EthnicityTotalPercentage
White45,74389.49%
Black1,6383.2%
Hispanic2,2194.34%
Asian1,5092.95%
Native American90.02%
Hawaiian/Pac. Islander00%

63366 Public School Race/Ethnicity Breakdown

Race/EthnicityTotalPercentage
White5,61184.43%
Black4266.41%
Hispanic4236.36%
Asian1692.54%
Native American50.08%
Hawaiian/Pac. Islander120.18%

63366 Educational Attainment Levels

Highest Education LevelTotalPercentage
Less Than 1 Year of College2,4508.73%
Bachelor Degree6,01121.41%
High School Diploma8,12528.94%
No High School Diploma5161.84%
GED or Alternate1,1874.23%
1 or More Years of College4,53116.14%
Associates Degree2,7599.83%
Masters Degree2,0397.26%
Professional Degree3101.1%
Doctorate Degree1430.51%

63366 Geography

Coordinates38.86065674, -90.71509552
Adjacent ZIP Codes
Cities/Towns in 63366
RegionMetro St. Louis
Metropolitan/Micropolitan Stat AreaSt. Louis, MO-IL
Time ZoneCentral Daylight Time
IANA TimezoneAmerica/Chicago
Area75 Square Miles

63366 Weather and Climate Data

Plant Hardiness ZoneZone 6a: -10F to -5F
Average First Frost DateOctober 11 - 20
Average Last Frost DateApril 11 - 20
Koppen-Geiger Climate ZoneDfa - Humid Continental Hot Summers
Ecoregion72f - River Hills
63366 Annual Climate Data
JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)19243343536267655745352444
Avg Max Temp (°F)38445567768589888069554266
Avg Precip (In.)1.952.163.433.854.293.683.993.163.132.923.612.738.88

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