What is the population of Saint Mary?

The population of Saint Mary, IL is 585.

Where is Saint Mary located?

Saint Mary, IL is located at latitude 40.3461600 and longitude -90.9340200. It is in United States.

What is the area of Saint Mary?

The area of Saint Mary, IL is 36.93 km².

What is the elevation of Saint Mary?

Saint Mary, IL has an elevation of 174 meters (571 feet) above sea level.

What time zone is Saint Mary in?

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

What state is Saint Mary in?

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

What county is Saint Mary, IL in?

Saint Mary is in Hancock County, Illinois.

How has the population of Saint Mary changed?

The population of Saint Mary, IL has decreased from 640 (2010) to 585 (2020), a change of -8.6%.

Saint Mary, IL - Geographic Facts & Maps

Saint Mary: township in Hancock County, Illinois.

About

Saint Mary is a township located in the county of Hancock in the U.S. state of Illinois. Its population at the 2010 census was 640 and a population density of 17 people per km². After 10 years in 2020 city had an estimated population of 585 inhabitants.

The township was created 177 years ago in 1849.

Quick Facts about Saint Mary

Population	585 (2020)
Country	United States of America
State	Illinois (United States)
County	Hancock County
Area	36.93 km²
Latitude & Longitude	40.3462,-90.9340
Altitude	538 feet / 164 meters
Establishment	November 06, 1849 (177 years ago)
Time Zone	America/Chicago
Local time	09:41:07 (6th November 2026)
Density	16 Pop. per km² as of 2020
Population growth	-8.59% (2010-2020)
Weather	40℉ Mostly Cloudy 7-days weather

Geography

Saint Mary is located at 40°20'46"N 90°56'2"W (40.3461600, -90.9340200).

Saint Mary map

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Weather

40°F

Mostly Cloudy

10 mph N Overnight

Mostly cloudy. Low around 40, with temperatures rising to around 42 overnight. North wind around 10 mph.

7-Day Forecast

Demographics

According to census records, the population of Saint Mary decreased by 8.59% in 10 years.

Year	Population	% Change	Method
2010	640	-	census
2011	636	-0.62%	estimation process
2012	631	-0.79%	estimation process
2013	622	-1.43%	estimation process
2014	615	-1.13%	estimation process
2015	611	-0.65%	estimation process
2016	611	0%	estimation process
2017	603	-1.31%	estimation process
2018	598	-0.83%	estimation process
2019	594	-0.67%	estimation process
2020	585	-1.52%	estimation process

Saint Mary's

Nearby Schools and Colleges

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

Code	Name	City	ZIP
149772	Western Illinois University	Macomb (IL)	61455

Nearby Transit Stations (7)

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

Code	Name	Address	Type
MAC	Macomb	120 East Calhoun Street	RAIL
FMD	Fort Madison station	1601 20th Street	RAIL
BRL	Burlington	300 South Main Street	RAIL
QCY	Quincy	North 30th St. and Wisman Lane	RAIL
GBB	Galesburg station	225 South Seminary Street	RAIL

Nearby Post Offices

Closest post offices linked to Saint Mary.

Post Office Name	City	ZIP
Plymouth Post Office	Plymouth (IL)	62367

Other cities in Hancock County

Cities, towns, neighborhoods & other populated places in Hancock County , IL.

City Name	Population	Title
Carthage	2,419	City in and county seat of Hancock County, Illinois, United States
Warsaw	1,456	City in Illinois, United States
La Harpe	1,123	City in Hancock County, Illinois, United States
Nauvoo	1,044	City and historic district in Hancock County, Illinois, United States

Saint Mary, Illinois