Residential delivery area · Missouri
ZIP Code 63664: Potosi, MO
ZIP code 63664 uses the postal name Potosi, Missouri and lies entirely in Washington County (Census 2020 ZIP-county file). About 9,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $61,216 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Potosi; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Potosi · its only residential ZIP
- County
- Washington County
- Census places
- Potosi
- House district
- MO-3 119th Congress
- State
- Missouri
- Time zone
- Central
- Land area
- 287.7 sq mi · 34 people per sq mi
Where is ZIP code 63664?
63664 centers on 37.917°, -90.914° and covers 287.7 square miles of land plus 1.0 of water. It borders 11 ZIP codes: 63622, 63660, 63630, 63631, 63648, 63626, 63623, 63071, 65565, 65441 and more.
The map draws ZIP code areas only. For the streets inside 63664, 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 63664 compare with the rest of Washington County?
| Measure | 63664 | In Washington County | In MO |
|---|---|---|---|
| People (ACS 2020-2024) | 9,693 | 4th of 16 | 193rd of 1,035 |
| Median household income | $61k | 5th of 9 | 287th of 479 |
| Median home value | $125k | 6th of 8 | 419th of 494 |
Its median household income is higher than in 31% of U.S. residential ZIP codes, and it is denser than 35% 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 63664?
The 2020 Census counted 8,333 people in 63664; the ACS, which samples households over 2020-2024, estimates 9,693. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 9,693
- 2020 Census count
- 8,333
- Households
- 3,658
- Median age
- 36.9
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 63664?
Of the 9,693 people the ACS estimates in 63664, 25.3% are under 18 and 19.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (91.5%).
- Under 1825.3%
- 18 to 6455.2%
- 65 and older19.6%
- White, not Hispanic91.5%
- Other or two or more6.6%
- Hispanic or Latino1.6%
- Black, not Hispanic0.2%
- Asian, not Hispanic0.2%
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 63664 earn?
Median household income is $61,216 (ACS 2020-2024), the 5th highest of the 9 ranked ZIP codes in Washington County.
- Median household income
- $61,216±$11,378
- Income per person
- $27,198
- Below the poverty line
- 18.6%
- Unemployed (of the labor force)
- 3.0%
- Adults 25+ with a bachelor's degree
- 13.7%
- Adjusted gross income per tax return, 2022
- $50,9843,390 returns; wages 74% 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 63664?
FHFA's house price index for 63664, built from repeat sales and appraisals of the same homes, rose 98% from 2015 to 2025 and rose 49% from 2020 to 2025, and moved −1.0% in 2025.
- Median home value (owners' estimate)
- $125,100
- Median gross rent
- $676
- Homes owned by their occupants
- 73.2%
- Housing units
- 4,121
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 63664?
207 business establishments had a location in this ZIP code in 2023, 5 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade35
- Health care and social assistance31
- Other services (except public administration)27
- Construction20
- Accommodation and food services17
- Finance and insurance16
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 63664?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63622 | Belgrade | 764 | $32k | 8.7 mi |
| 63660 | Mineral Point | 2,784 | $51k | 11.3 mi |
| 63630 | Cadet | 4,006 | $53k | 13.1 mi |
| 63631 | Caledonia | 544 | $74k | 13.2 mi |
| 63648 | Irondale | 1,858 | $52k | 13.6 mi |
| 63626 | Blackwell | 588 | $83k | 15.5 mi |
| 63623 | Belleview | 895 | $45k | 16.4 mi |
| 63071 | Richwoods | 1,113 | $45k | 16.9 mi |
| 65565 | Steelville | 4,845 | $50k | 17.8 mi |
| 65441 | Bourbon | 5,028 | $65k | 18.2 mi |
| 63080 | Sullivan | 13,124 | $67k | 22.4 mi |
| 65566 | Viburnum | 858 | $40k | 15.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.