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Zip Code 63341 — Defiance, MO

63341 is a ZIP Code associated with Defiance, MO, located within St. Charles. The postal region supports an estimated population of 3,515 residents across Data Pending housing units, with a population density of 34.9 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.664930, -90.817830)

Data Metric	Local Statistic
Postal / Zip Code	63341
Primary City	Defiance
State / Province	MO
County	St. Charles
Total Population	3,515
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	34.9 people/sq mi
Timezone	America/Chicago

How 63341 Compares

Metric	ZIP 63341	St. Charles County	MO State Average
Population	3,515	416,486	6,191,989
Median Income	Data Pending	N/A	N/A
Population Density	34.9 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 63365	New Melle	4.3 mi	51	N/A
Zip 63332	Augusta	5.9 mi	1,651	N/A
Zip 63073	Saint Albans	6.2 mi	803	N/A
Zip 63304	Saint Charles	7.6 mi	43,195	N/A
Zip 63368	O'Fallon	7.7 mi	46,966	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →