What is the population of Ottawa?

The population of Ottawa, IL is 18,097.

Where is Ottawa located?

Ottawa, IL is located at latitude 41.3455900 and longitude -88.8425800. It is in United States.

What is the area of Ottawa?

The area of Ottawa, IL is 34.893301 km².

What is the elevation of Ottawa?

Ottawa, IL has an elevation of 147 meters (482 feet) above sea level.

What time zone is Ottawa in?

Ottawa, IL is in the America/Chicago time zone.

What state is Ottawa in?

Ottawa is in the state of Illinois, United States.

What county is Ottawa, IL in?

Ottawa is in LaSalle County, Illinois.

How has the population of Ottawa changed?

The population of Ottawa, IL has decreased from 18,768 (2010) to 18,097 (2020), a change of -3.6%.

Ottawa, Illinois

Ottawa: city in Illinois, United States

About

Ottawa is a city located in the county of LaSalle in the U.S. state of Illinois. Its population at the 2010 census was 18,768 and a population density of 538 people per km². After 10 years in 2020 city had an estimated population of 18,097 inhabitants.

The city was created 173 years ago in 1852.

Ottawa locator map — Location of Ottawa on Illinois map.

Quick Facts about Ottawa

Population	18,097 (2020)
Country	United States of America
State	Illinois (United States)
County	LaSalle County
Different from	Ottawa
Postal code	61350
Area	34.89 km²
Latitude & Longitude	41.3456,-88.8426
Altitude	482 feet / 147 meters
Capital city	Ottawa is capital of LaSalle County
Establishment	January 01, 1853 (173 years ago)
Time Zone	America/Chicago
Local time	20:42:57 (14th April 2026)
Density	519 Pop. per km² as of 2020
Population growth	-3.71% (2010-2020)
Weather	78℉ Showers And Thunderstorms 7-days weather

Ottawa IL Downtown1 image

Geography

Ottawa is located at 41°20'44"N 88°50'33"W (41.3455900, -88.8425800).

Ottawa map

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Weather

78°F

Showers And Thunderstorms

15 to 20 mph SW Tuesday

Showers and thunderstorms. Mostly cloudy, with a high near 78.

7-Day Forecast

Official website of Ottawa

Official Website

Demographics

According to census records, the population of Ottawa decreased by 3.71% in 10 years.

Year	Population	% Change	Method
2010	18,768	-	census
2011	18,809	0.22%	estimation process
2012	18,692	-0.63%	estimation process
2013	18,640	-0.28%	estimation process
2014	18,544	-0.52%	estimation process
2015	18,439	-0.57%	estimation process
2016	18,343	-0.52%	estimation process
2017	18,267	-0.42%	estimation process
2018	18,217	-0.27%	estimation process
2019	18,139	-0.43%	estimation process
2020	18,097	-0.23%	estimation process

Ottawa zip code is 61350. County name: LaSalle, County fips: 17099

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Best Things to Do in Ottawa

1Buffalo Rock State Park

Rating: 4.4 (603)

1300 N 27th Rd, Ottawa, IL 61350, United States View details

Phone: +18154332220 | Website available

2Allen Park

Rating: 4.5 (401)

400 Courtney Street, Ottawa, IL 61350, United States View details

Phone: +18154330161 | Website available

3Washington Square Park

Rating: 4.6 (387)

101 E Lafayette St, Ottawa, IL 61350, United States View details

Phone: +18154330161 | Website available

4Fox River Park

Rating: 4.4 (259)

717 Hudson St, Ottawa, IL 61350, United States View details

Phone: +18154330161

5Jordan Block

Rating: 4.3 (110)

101-123 W Main St, Ottawa, IL 61350, United States View details

Where to Eat in Ottawa

1Jimmy John's

Rating: 4.3 (215)

1202 Columbus St, Ottawa, IL 61350, United States View details

Phone: +18154339133 | Website available

2Dettore's Town Lanes, Inc.

Rating: 4.1 (40)

714 Columbus St, Ottawa, IL 61350, United States View details

Phone: +18154330033 | Website available

Services and Civic Places in Ottawa

1Ottawa City Hall

Rating: 3 (4)

301 W Madison St, Ottawa, IL 61350 View details

Phone: +18154330161 | Website available

2City of Ottawa - Community Development

301 W Madison St, Ottawa, IL 61350 View details

Phone: +18154330161 | Website available

3DEER PARK TOWN HALL

TOWN HALL, 2346 E 1025th Rd, Ottawa, IL 61350 View details

4Fall River Township Town Hall

1805 N 25th Rd, Ottawa, IL 61350 View details

Phone: +18154345325

People born in Ottawa (50)

People born in Ottawa, including paleontologist Stephen L. Brusatte, film director and screenwriter Terrence Malick, judge Harry Kelly, .

More notable people

Russell Lee (American photographer) he was born in 21/07/1903
Johnston McCulley (American writer) he was born in 02/02/1883
Arthur Gossard (American scientist) he was born in 18/06/1935
Bob Christman (American male curler) he was born in 07/12/1942
Bob McGrath (American singer and actor) he was born in 13/06/1932
Charles Plamondon (American entrepreneur and industrialist based in Chicago.) he was born in 14/09/1856
George R. Lawrence (American photographer) he was born in 24/02/1868
Frederick Moloney (American Olympic medalist) he was born in 04/08/1882
Maria Kanellis (American professional wrestler, manager, actress, model and singer) she was born in 25/02/1982
Walt Willey (American actor) he was born in 26/01/1951
Tom Flanagan (author, academic, and political activist) he was born in 05/03/1944
Aaron Shea (American football player) he was born in 05/12/1976
Arthur L. Wagner (United States brigadier general and military instructor) he was born in 16/03/1853
Barbara Shearer (American musician) she was born in 16/09/1936
Charlie Jaeger (American baseball player) he was born in 17/04/1875
Donald Grobe (opera singer) he was born in 16/12/1929
Ed Mickelson (Major League Baseball first baseman) he was born in 09/09/1926
Emil Lockwood (American politician) he was born in 23/09/1919

Nearby Schools and Colleges

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

Code	Name	City	ZIP
145831	Illinois Valley Community College	Oglesby (IL)	61348-9692

Nearby Transit Stations (20)

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

Code	Name	Address	Type
MDT	Mendota station	783 Main Street	RAIL
PLO	Plano	101 West Main Street	RAIL
DWT	Dwight station	119 West Main St.	RAIL
PCT	Princeton	107 Bicentennial Dr.	RAIL
PON	Pontiac station	721 West Washington St.	RAIL

Nearby Post Offices

Closest post offices linked to Ottawa.

Post Office Name	City	ZIP
Downtown Ottawa Post Office	Ottawa (IL)	61350

Other places with the same name (4)

Ottawa, Ohio village in Ohio with a population of 4,323 people.
Ottawa, Wisconsin town in Wisconsin, United States with a population of 3,937 people.
Ottawa, Minnesota human settlement in United States of America with a population of 291 people.
Ottawa, Kansas town in Kansas, United States with a population of 43 people.

Other cities in LaSalle County

Cities, towns, neighborhoods & other populated places in LaSalle County , IL. (more)

City Name	Population	Title
Streator	12,933	City in Illinois
Peru	9,612	City in Illinois, United States
La Salle	9,609	City in LaSalle County, Illinois, United States
Mendota	6,904	Township in LaSalle County, Illinois
Northville	6,753	Township in LaSalle County, Illinois
Marseilles	4,778	City in LaSalle County, Illinois
Deer Park	4,199	Village in United States of America
Oglesby	3,526	City in LaSalle Co.
Sheridan	2,515	Village in Illinois, United States
Seneca	2,179	Village in Illinois
Utica	1,988	Village also known as Utica, in LaSalle County, Illinois
Earlville	1,570	City in Delaware County, Iowa, United States of America
Garfield	1,483	Human settlement in Illinois, United States of America
Serena	1,088	Human settlement in Illinois, United States of America
Leland	902	Village in Illinois, United States
Farm Ridge	858	Township in LaSalle County, Illinois

Distance to Other Cities

Ottawa distances to largest Illinois cities