Washington County · Missouri
ZIP code 63631
- Population
- 687
- Median income
- $72,344
- Median home
- $138,100
- Sales tax
- 4.225%
ZCTA residents
Household, past 12 months
Owner-occupied value
Missouri state rate
Quick answer
ZIP 63631 sits in Washington County, Missouri and is home to 687 people. Median household income is $72,344, the median home is worth $138,100 and median gross rent is $763. 87.8% of households own their home, and purchases are taxed at 4.225% (Missouri state rate).
- County
- Washington County
- State
- Missouri (MO)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 29221
1,035 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 63631
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 687ZIP 63631 residents
- Median household income
- $72,344Past 12 months, inflation adjusted
- Median home value
- $138,100Owner-occupied units
- Median gross rent
- $763Rent plus utilities, monthly
- Median age
- 47.6 yrsAll residents
- Homeownership rate
- 87.8%Owner-occupied households
Sales tax in 63631
What a purchase inside this ZIP costs at checkout.
Missouri levies 4.225% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 63631 compares
ZIP 63631 against the median ZIP in Washington County and across Missouri.
| Measure | ZIP 63631 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $72,344 | $52,071 | $60,651 | +19% |
| Median home value | $138,100 | $118,200 | $162,000 | -15% |
| Median gross rent | $763 | $763 | $805 | -5% |
| Population | 687 | 1,049 | 1,453 | -53% |
Medians are computed across the 10 ZIP areas in Washington County and the 1035 ZIP areas in Missouri.
Statewide rank
Where this ZIP places among all 1035 Missouri ZIP areas.
- Income
- #279
- Home value
- #573
- Population
- #712
richer than 71% of 958 state ZIPs
above 39% of 933 state ZIPs
larger than 31% of 1,035 state ZIPs
Comparable ZIP codes
Missouri ZIP areas with almost the same household income.
Nearby ZIP codes
Other ZIP codes filed under Washington County.
ZIP 63631 questions
Common questions about this ZIP code.
- Where is ZIP code 63631?
- ZIP 63631 lies mostly in Washington County, Missouri. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 63631?
- Missouri charges 4.225% statewide, plus any county, city or district rate that applies locally.
- Is 63631 expensive to live in?
- Median rent runs $763 a month, about 13% of median household income, and the median home is worth $138,100 — -15% against the typical Missouri ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Missouri Department of Revenue — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.