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zipcodes.pro — CITY/MO/ST-MARY

St. Mary ZIP code, Missouri

The ZIP code for St. Mary, MO is 63673, and its area code is 573.

USPS city name
1 ZIP code
Population
285
Area code
573

Also written Saint Mary, the spelling the Postal Service uses.

NANPA lists no telephone rate centre for St. Mary itself, so these are the area codes of the nearest one, Sainte Genevieve (10.4 miles). A town on an area-code boundary can differ from its neighbour.

St. Mary in numbers

About 285 people live in St. Mary, in 108 households. The median household income is $49,643 a year, 30% below the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $120,000 (48% below the Missouri median), and median gross rent is $775 a month. The median age is 48.9; 10.6% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 28 minutes.

Population285St. Mary285
Households108St. Mary108
Median age48.9St. Mary48.9Missouri39.0US 38.9
Median household income$49,643St. Mary$49,643Missouri$70,702US $80,734
Median home value$120,000St. Mary$120,000Missouri$230,300US $332,700
Median gross rent$775St. Mary$775Missouri$1,033US $1,413
Bachelor's degree or higher10.6%St. Mary10.6%Missouri32.4%US 35.7%
Mean commute28.1 minSt. Mary28.1 minMissouri23.5 minUS 26.4 min
Population density476 / sq miSt. Mary476 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place St. Mary city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Saint Mary

ZIP codes with the USPS city name Saint Mary
ZIP City Type Population Median income Median home
63673 Saint Mary , MO Standard 2,340 $77,931 $235,900

Map of St. Mary ZIP codes

63673

The ZIP codes of St. Mary, MO, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near St. Mary

The nearest larger towns are Ozora (299 people, 5.6 mi), Brewer (413 people, 6.5 mi) and Chester, IL (6,797 people, 7.6 mi).

Towns near St. Mary
TownPopulationDistance
Chester, IL 6,797 7.6 mi
Ste. Genevieve 5,010 8.9 mi
Perryville 8,536 10.9 mi
Sparta, IL 4,068 21.9 mi
Red Bud, IL 3,782 23.2 mi
Farmington 18,282 26.8 mi
Fredericktown 4,507 28.9 mi

More nearby: every ZIP code in Ste. Genevieve County · Missouri ZIP codes

Cite this page

zipcodes.pro. “St. Mary, MO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mo/st-mary

Underlying data is public domain or openly licensed — sources, vintages and licences.