Residential delivery area · Missouri
ZIP Code 63341: Defiance, MO
ZIP code 63341 uses the postal name Defiance, Missouri and lies entirely in St. Charles County (Census 2020 ZIP-county file). About 3,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $170,598 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Defiance (a census-designated place); 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Defiance · its only residential ZIP
- County
- St. Charles County
- Census places
- Defiance census-designated place
- Metro area
- St. Louis, MO-IL
- House district
- MO-2 119th Congress
- State
- Missouri
- Time zone
- Central
- Land area
- 38.8 sq mi · 91 people per sq mi
Where is ZIP code 63341?
63341 centers on 38.661°, -90.807° and covers 38.8 square miles of land plus 1.1 of water. It borders 6 ZIP codes: 63365, 63073, 63332, 63304, 63385, 63348.
The map draws ZIP code areas only. For the streets inside 63341, 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 63341 compare with the rest of St. Charles County?
| Measure | 63341 | In St. Charles County | In MO |
|---|---|---|---|
| People (ACS 2020-2024) | 3,515 | 11th of 15 | 339th of 1,035 |
| Median household income | $171k | 1st of 11 | 6th of 479 |
| Median home value | $607k | 1st of 12 | 6th of 494 |
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 52% 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 63341?
The 2020 Census counted 3,784 people in 63341; the ACS, which samples households over 2020-2024, estimates 3,515. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 3,515±497 (90% margin)
- 2020 Census count
- 3,784
- Households
- 1,324
- Median age
- 48.6
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 63341?
Of the 3,515 people the ACS estimates in 63341, 21.3% are under 18 and 16.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.4%).
- Under 1821.3%
- 18 to 6462.2%
- 65 and older16.4%
- White, not Hispanic89.4%
- Other or two or more6.7%
- Hispanic or Latino3.6%
- Black, not Hispanic0.3%
- Asian, not Hispanic0.0%
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 63341 earn?
Median household income is $170,598 (ACS 2020-2024), the highest of the 11 ranked ZIP codes in St. Charles County.
- Median household income
- $170,598±$27,080
- Income per person
- $91,428
- Below the poverty line
- 6.2%
- Unemployed (of the labor force)
- 2.3%
- Adults 25+ with a bachelor's degree
- 54.1%
- Adjusted gross income per tax return, 2022
- $162,1802,030 returns; wages 58% 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 63341?
FHFA's house price index for 63341, built from repeat sales and appraisals of the same homes, rose 116% from 2015 to 2025 and rose 65% from 2020 to 2025, and moved +15.9% in 2025.
- Median home value (owners' estimate)
- $606,800
- Median gross rent
- –
- Homes owned by their occupants
- 95.5%
- Housing units
- 1,437
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 63341?
89 business establishments had a location in this ZIP code in 2023, 8 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction24
- Administrative and support and waste management and remediation services12
- Professional, scientific, and technical services9
- Manufacturing6
- Wholesale trade6
- Retail trade5
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 63341?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63365 | New Melle | 51 | $54k | 4.9 mi |
| 63073 | Saint Albans | 803 | $250k+ | 5.6 mi |
| 63332 | Augusta | 1,651 | $146k | 6.4 mi |
| 63304 | Saint Charles | 43,195 | $114k | 7.2 mi |
| 63385 | Wentzville | 51,330 | $112k | 9.8 mi |
| 63348 | Foristell | 10,394 | $116k | 11.4 mi |
| 63368 | O Fallon | 46,966 | $124k | 7.6 mi (near) |
| 63367 | Lake Saint Louis | 29,725 | $138k | 7.9 mi (near) |
| 63005 | Chesterfield | 19,779 | $199k | 8.5 mi (near) |
| 63055 | Labadie | 1,693 | $79k | 9.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.