63366 Property Tax Rate
O Fallon, Missouri · Part of St. Charles County
Effective Tax Rate
1.16%
138.5% above state avgMedian Annual Tax
$3,282
$274/mo escrow
Estimate Your Tax
Annual Tax
$3,282
Monthly
$273
Eff. Rate
1.16%
Buyer decision brief
What ZIP 63366 means for your housing budget
Use this ZIP page to compare recurring tax burden before you compare listing prices. The numbers below are Census ZCTA estimates, so they are strongest for neighborhood comparison and weakest for parcel-specific tax planning.
Monthly escrow signal
$274/mo
Based on median annual tax paid
State context
0.38 percentage points above the Missouri average
Missouri average: 0.78%
Data confidence
High confidenceThe Census margin of error is $101, about 3% of the median tax estimate.
Verify before you offer
- Confirm parcel assessed value with St. Charles County assessor.
- Check homestead, senior, veteran, and disability exemptions.
- Ask whether purchase triggers reassessment or value-cap reset.
- Review school district and special assessment boundaries.
Lower-rate similar ZIPs
This is informational content, not tax, legal, or mortgage advice. Local assessor records remain the source of truth for a specific property.
Data confidence ledger
Can you trust ZIP 63366 for comparison?
ACS vintage
2019-2023 ACS 5-Year Estimates
Five-year Census ZCTA estimates.
ZCTA caveat
Census area, not parcel boundary
USPS ZIP routes and taxing districts can differ inside the same area.
Field completeness
3/3 required fields
Median tax, home value, and derived rate are present.
MOE status
Strong ACS confidence
$101 tax MOE, 3% of the median tax estimate.
Last site refresh
March 10, 2026
Dataset and page-quality audit run locally before publication.
County fallback
County advisory available
St. Charles County is used for assessor verification and broader context.
Tax bill anatomy
What can change your actual bill in ZIP 63366
Use the ZIP estimate to compare neighborhoods, then verify these parcel-level inputs before relying on a payment estimate.
Assessed value
The ZCTA median home value is $283,900, but your bill starts with the local assessed value for a specific parcel.
Effective rate
The displayed rate is 1.16%, derived from median tax paid divided by median home value.
Exemptions
Homestead, senior, veteran, disability, and local exemptions can reduce taxable value. Confirm eligibility before estimating escrow.
Reassessment
A purchase can change assessed value depending on Missouri and county rules. Ask how sale price affects the next assessment cycle.
Escrow impact
The median tax paid in this ZCTA equals about $274 per month before insurance, HOA dues, or special assessments.
Assessor verification
St. Charles County assessor or tax collector records are the source of truth for parcel taxes, appeal windows, and exemptions.
How ZIP 63366 Compares
Median Annual Property Tax
ZIP 63366
1.16%
Effective rate
Missouri Avg
0.78%
Effective rate
National Avg
1.10%
Effective rate
State Ranking
Property Tax Rank in Missouri
Higher than 90% of ZIP codes in Missouri(90th percentile, 915 ZIPs compared)
Property Tax Analysis
Property Tax Insights for ZIP 63366
Property owners in ZIP code 63366 (O Fallon, Missouri) pay a median of $3,282/year in property taxes on homes valued at $283,900. This translates to an effective tax rate of 1.16%, which is 49% above the Missouri state average of 0.78%.
The monthly property tax burden for a median-valued home in 63366 is approximately $274, which factors into escrow payments on mortgages. This ZIP code is located within St. Charles County. This is $1,906 more than the Missouri average of $1,376/year.
Compared to similar ZIP codes in Missouri, 63366 has lower property taxes. ZIP codes with similar effective rates include 64476 (1.16%) and 63132 (1.16%).
In O Fallon, property taxes represent approximately 3.3% of the median household income of $98,237, providing context for the relative tax burden on homeowners in this area.
Missouri has no statewide property tax cap; your assessed value can increase annually without limit, and the St. Charles County Assessor will reassess at market value upon sale. The Homestead Property Tax Credit exempts up to $15,000 of assessed value for primary residences and saves eligible homeowners hundreds annually — apply with St. Charles County by the state deadline. Contact the St. Charles County Assessor's office within 60 days of purchase to verify your assessment and request a Homestead Certificate to lock in the exemption.
Frequently Asked Questions
What is the property tax rate in ZIP code 63366?
How much are property taxes in O Fallon, MO (63366)?
How does ZIP 63366 compare to the Missouri average?
What is the median home value in ZIP 63366?
What county is ZIP code 63366 in?
Margin of Error
The median property tax estimate for this ZIP code has a margin of error of ±$101. ZCTA-level data has wider margins than county-level estimates due to smaller sample sizes.
County-Level Data
ZIP code 63366 is part of St. Charles County, Missouri. View the full county profile for broader context and more data.
View St. Charles County on TaxByCounty →Explore O Fallon, MO
View all 2 ZIP codes in O Fallon with property tax comparisons.
View O Fallon Property Tax Rates →Why compare these ZIPs?
Better comparison set for ZIP 63366
Each ZIP highlights a homebuyer tradeoff: lower rate, stronger value context, shared county rules, city boundary changes, or nearby missing data.
63368
O Fallon, MO
0.01 percentage points lower than ZIP 63366.
Rate
1.15%
Tax
$3,759
Quality
96
63332
Augusta, MO
0.31 percentage points lower than ZIP 63366.
Rate
0.85%
Tax
$3,261
Quality
91
63341
Defiance, MO
0.29 percentage points lower than ZIP 63366.
Rate
0.86%
Tax
$4,773
Quality
91
63348
Foristell, MO
0.22 percentage points lower than ZIP 63366.
Rate
0.94%
Tax
$3,413
Quality
91
63386
West Alton, MO
0.16 percentage points lower than ZIP 63366.
Rate
1.00%
Tax
$1,558
Quality
86
63304
Saint Charles, MO
0.13 percentage points lower than ZIP 63366.
Rate
1.03%
Tax
$3,413
Quality
96
63301
Saint Charles, MO
0.07 percentage points lower than ZIP 63366.
Rate
1.09%
Tax
$2,708
Quality
96
63373
Portage Des Sioux, MO
0.07 percentage points lower than ZIP 63366.
Rate
1.09%
Tax
$2,252
Quality
91
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates (ZCTA level). ZIP Code Tabulation Areas (ZCTAs) are Census approximations of USPS ZIP codes.
Estimates are informational only and should not be used as financial or legal advice.