What is the population of Saint Mary?

The population of Saint Mary, MO is 345.

Where is Saint Mary located?

Saint Mary, MO is located at latitude 37.8789400 and longitude -89.9492800. It is in United States.

What is the area of Saint Mary?

The area of Saint Mary, MO is 1.57702 km².

What is the elevation of Saint Mary?

Saint Mary, MO has an elevation of 119 meters (390 feet) above sea level.

What time zone is Saint Mary in?

Saint Mary, MO is in the America/Chicago time zone.

What state is Saint Mary in?

Saint Mary is in the state of Missouri, United States.

What county is Saint Mary, MO in?

Saint Mary is in Sainte Genevieve County, Missouri.

How has the population of Saint Mary changed?

The population of Saint Mary, MO has decreased from 360 (2010) to 345 (2020), a change of -4.2%.

Saint Mary, MO - Geographic Facts & Maps

Saint Mary, Missouri

Saint Mary: city in Missouri, United States.

About

Saint Mary is a city located in the county of Sainte Genevieve in the U.S. state of Missouri. Its population at the 2010 census was 360 and a population density of 228 people per km². After 10 years in 2020 city had an estimated population of 345 inhabitants.

Quick Facts about Saint Mary

Population	345 (2020)
Country	United States of America
State	Missouri (United States)
County	Sainte Genevieve County
Phone Area Codes	573
Area	1.58 km²
Latitude & Longitude	37.8789,-89.9493
Altitude	384 feet / 117 meters
Time Zone	America/Chicago
Local time	15:06:43 (17th October 2026)
Postal code	63673
Density	219 Pop. per km² as of 2020
Population growth	-4.17% (2010-2020)
Weather	60℉ Sunny 7-days weather

Geography

Saint Mary is located at 37°52'44"N 89°56'57"W (37.8789400, -89.9492800).

Saint Mary map

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Weather

60°F

Sunny

3 to 9 mph N Saturday

Sunny, with a high near 60. North wind 3 to 9 mph.

7-Day Forecast

Demographics

According to census records, the population of Saint Mary decreased by 4.17% in 10 years.

Year	Population	% Change	Method
2010	360	-	census
2011	363	0.83%	estimation process
2012	354	-2.48%	estimation process
2013	354	0%	estimation process
2014	353	-0.28%	estimation process
2015	348	-1.42%	estimation process
2016	349	0.29%	estimation process
2017	347	-0.57%	estimation process
2018	349	0.58%	estimation process
2019	346	-0.86%	estimation process
2020	345	-0.29%	estimation process

Saint Mary zip code is 63673. County name: Ste. Genevieve, County fips: 29186

Camp Rowdy, Iron Mountain City, Saint Marys, Saint Marys Landing, Yankeetown

Nearby Schools and Colleges

Schools and campuses linked to Saint Mary, MO. Select a name to open its map and contact details.

Code	Name	City	ZIP
417442	Career Center of Southern Illinois	Red Bud (IL)	62278
178217	Mineral Area College	Park Hills (MO)	63601-1000
483911	Creative Touch Cosmetology School	Waterloo (IL)	62298-1609

Nearby Transit Stations (9)

Rail and bus stations connected to Saint Mary, MO. Select a station to open its map and address details.

Code	Name	Address	Type
DQN	Du Quoin	20 North Chestnut St.	RAIL
CDL	Carbondale station	401 South Illinois St.	RAIL
STL	Gateway Transportation Center	551 South 16th St.	RAIL
KWD	Kirkwood	110 West Argonne Dr.	RAIL
MAI	Marion, IL	2100 West Main Street	BUS