Residential delivery area · Missouri
ZIP Code 63368: O Fallon, MO
ZIP code 63368 uses the postal name O Fallon, Missouri and lies entirely in St. Charles County (Census 2020 ZIP-county file). About 47,000 people live there (Census Bureau, ACS 2020-2024), the less populous of O Fallon's 2 residential ZIP codes. Median household income is $124,297 (Census Bureau, ACS 2020-2024). Most of its land (55%) lies in the city of O'Fallon.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- O Fallon · 2 residential ZIPs
- County
- St. Charles County
- Census places
- O'Fallon (55%); Dardenne Prairie (32%)
- Metro area
- St. Louis, MO-IL
- House districts
- MO-2 (92%), MO-3 (8%) 119th Congress, by share of land
- State
- Missouri
- Time zone
- Central
- Land area
- 16.2 sq mi · 2,896 people per sq mi
Where is ZIP code 63368?
63368 centers on 38.752°, -90.728° and covers 16.2 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 63304, 63367, 63376, 63366, 63385.
The map draws ZIP code areas only. For the streets inside 63368, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 63368 compare with the rest of O Fallon?
| Measure | 63368 | In O Fallon | In St. Charles County | In MO |
|---|---|---|---|---|
| People (ACS 2020-2024) | 46,966 | 2nd of 2 | 5th of 15 | 13th of 1,035 |
| Median household income | $124k | 1st of 2 | 3rd of 11 | 18th of 479 |
| Median home value | $349k | 1st of 2 | 6th of 12 | 48th of 494 |
Its median household income is higher than in 92% of U.S. residential ZIP codes, and it is denser than 88% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 63368?
The 2020 Census counted 46,007 people in 63368; the ACS, which samples households over 2020-2024, estimates 46,966. Between the 2010 and 2020 censuses its population grew 6.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 46,966
- 2020 Census count
- 46,007+6.1% since 2010 (43,360)
- Households
- 17,271
- Median age
- 38.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 63368?
Of the 46,966 people the ACS estimates in 63368, 25.5% are under 18 and 12.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (82.0%).
- Under 1825.5%
- 18 to 6461.8%
- 65 and older12.8%
- White, not Hispanic82.0%
- Asian, not Hispanic6.5%
- Other or two or more4.1%
- Black, not Hispanic3.7%
- Hispanic or Latino3.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 63368 earn?
Median household income is $124,297 (ACS 2020-2024), the 3rd highest of the 11 ranked ZIP codes in St. Charles County. It is not measurably different from 2015-2019 ($126,993 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $124,297
- Income per person
- $52,532
- Below the poverty line
- 3.8%
- Unemployed (of the labor force)
- 2.1%
- Adults 25+ with a bachelor's degree
- 50.9%
- Adjusted gross income per tax return, 2022
- $105,03822,360 returns; wages 75% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 63368?
FHFA's house price index for 63368, built from repeat sales and appraisals of the same homes, rose 91% from 2015 to 2025 and rose 55% from 2020 to 2025, and moved +8.7% in 2025.
- Median home value (owners' estimate)
- $349,200
- Median gross rent
- $1,482
- Homes owned by their occupants
- 82.0%
- Housing units
- 17,614
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 63368?
831 business establishments had a location in this ZIP code in 2023, 107 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance158
- Professional, scientific, and technical services92
- Finance and insurance88
- Retail trade82
- Accommodation and food services77
- Other services (except public administration)76
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 63368?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63304 | Saint Charles | 43,195 | $114k | 3.9 mi |
| 63367 | Lake Saint Louis | 29,725 | $138k | 3.9 mi |
| 63376 | Saint Peters | 74,962 | $96k | 7.1 mi |
| 63366 | O Fallon | 54,769 | $101k | 7.3 mi |
| 63385 | Wentzville | 51,330 | $112k | 7.6 mi |
| 63341 | Defiance | 3,515 | $171k | 7.6 mi (near) |
| 63365 | New Melle | 51 | $54k | 8.3 mi (near) |
| 63005 | Chesterfield | 19,779 | $199k | 8.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.