Residential delivery area · Missouri
ZIP Code 63673: Saint Mary, MO
ZIP code 63673 uses the postal name Saint Mary, Missouri and lies mostly in Ste. Genevieve County (49% of its land), reaching into Perry County and Randolph County (Census 2020 ZIP-county file). About 2,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $77,931 (Census Bureau, ACS 2020-2024). By Census place, its land lies in St. Mary (under 1%) and Kaskaskia (under 1%), and 3% in smaller places; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Saint Mary · its only residential ZIP
- County
- Ste. Genevieve County (49%); Perry County (30%); Randolph County (20%)
- Census places
- St. Mary (under 1%); Kaskaskia (under 1%)
- House districts
- MO-8 (80%), IL-12 (20%) 119th Congress, by share of land
- State
- Missouri
- Time zone
- Central
- Land area
- 115.2 sq mi · 20 people per sq mi
Where is ZIP code 63673?
63673 centers on 37.842°, -89.991° and covers 115.2 square miles of land plus 2.7 of water. It borders 5 ZIP codes: 63670, 63775, 62241, 62233, 63645.
The map draws ZIP code areas only. For the streets inside 63673, 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 63673 compare with the rest of Ste. Genevieve County?
| Measure | 63673 | In Ste. Genevieve County | In MO |
|---|---|---|---|
| People (ACS 2020-2024) | 2,340 | 7th of 8 | 421st of 1,035 |
| Median household income | $78k | not ranked | not ranked |
| Median home value | $236k | 2nd of 6 | 161st of 494 |
63673's median household income is not ranked: its 90% margin of error (±$27,664) is more than a quarter of the figure ($77,931). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 26% of 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 63673?
The 2020 Census counted 2,078 people in 63673; the ACS, which samples households over 2020-2024, estimates 2,340. Between the 2010 and 2020 censuses its population fell 1.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,340±442 (90% margin)
- 2020 Census count
- 2,078−1.7% since 2010 (2,115)
- Households
- 892
- Median age
- 41.1
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 63673?
Of the 2,340 people the ACS estimates in 63673, 24.4% are under 18 and 17.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (97.6%).
- Under 1824.4%
- 18 to 6458.2%
- 65 and older17.4%
- White, not Hispanic97.6%
- Other or two or more1.7%
- Black, not Hispanic0.4%
- Asian, not Hispanic0.2%
- Hispanic or Latino0.1%
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 63673 earn?
Median household income is $77,931 (ACS 2020-2024). It is not measurably different from 2015-2019 ($64,608 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $77,931±$27,664
- Income per person
- $36,261
- Below the poverty line
- 18.4%
- Unemployed (of the labor force)
- 4.0%
- Adults 25+ with a bachelor's degree
- 19.7%
- Adjusted gross income per tax return, 2022
- $60,964970 returns; wages 71% 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 63673?
- Median home value (owners' estimate)
- $235,900
- Median gross rent
- $818
- Homes owned by their occupants
- 76.9%
- Housing units
- 1,102
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 63673?
21 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction5
- Other services (except public administration)5
- Retail trade3
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 63673?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 63670 | Sainte Genevieve | 12,293 | $63k | 10.4 mi |
| 63775 | Perryville | 16,325 | $64k | 10.9 mi |
| 62241 | Ellis Grove, IL | 879 | $83k | 12.8 mi |
| 62233 | Chester, IL | 8,326 | $85k | 13.0 mi |
| 63645 | Fredericktown | 11,554 | $55k | 27.6 mi |
| 62261 | Modoc, IL | 80 | – | 11.4 mi (near) |
| 62297 | Walsh, IL | 158 | $91k | 17.7 mi (near) |
| 62242 | Evansville, IL | 1,660 | $60k | 18.0 mi (near) |
| 63746 | Farrar | 11 | – | 18.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.