What is the population of Putnam County?

The population of Putnam County, IL is 5,716.

Where is Putnam County located?

Putnam County, IL is located at latitude 41.2044700 and longitude -89.2858300. It is in United States.

What is the area of Putnam County?

The area of Putnam County, IL is 446 km².

What is the elevation of Putnam County?

Putnam County, IL has an elevation of 195 meters (640 feet) above sea level.

What time zone is Putnam County in?

Putnam County, IL is in the America/Chicago time zone.

How has the population of Putnam County changed?

The population of Putnam County, IL has decreased from 6,006 (2010) to 5,716 (2020), a change of -4.8%.

Putnam County, Illinois

Putnam County: county in Illinois, United States.

About

Putnam County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 6,006 and a population density of 13 people per km². After 10 years in 2020 county had an estimated population of 5,716 inhabitants. Its county seat is Hennepin. The county was created 201 years ago in 1824.

Putnam County locator map — Location of Putnam County on Illinois map.

Quick Facts about Putnam County

Population	5,716 (2020)
Country	United States of America
State	Illinois (United States)
Different from	Putnam County, Putnam County, Putnam County, Putnam County, Putnam County, Putnam County, Putnam County, Putnam County
Area	446 km²
Water as percent of area	7%
Land as percent of area	93%
Latitude & Longitude	41.2045,-89.2858
Named for	Israel Putnam
Capital	Hennepin
Establishment	January 01, 1825
Time Zone	America/Chicago
Local time	05:30:26 (23rd September 2026)
Density	13 Pop. per km² as of 2020
Population growth	-4.83% (2010-2020)
Weather	67℉ Mostly Sunny 7-days weather

Putnam County Courthouse Hennepin image

Geography

Putnam County is located at 41°12'16"N 89°17'9"W (41.2044700, -89.2858300). It has 3 neighbors: Bureau County, La Salle County and Marshall County.

Putnam County map

Click "full screen"

icon to open full mode. View satellite images

Putnam County Populated Places

Cities, towns, neighborhoods & other populated places in Putnam County.

City Name	Population	Title

Weather

67°F

Mostly Sunny

5 to 10 mph NE Wednesday

Mostly sunny, with a high near 67.

7-Day Forecast

Official website of Putnam County

Official Website

Putnam County has 3 neighbours.

Bureau County county in Illinois, United States.
LaSalle County county in Illinois, United States.
Marshall County county in Illinois, United States.

Demographics

According to census records, the population of Putnam County decreased by 4.83% in 10 years.

Year	Population	% Change	Method
2010	6,006	-	census
2011	5,976	-0.5%	estimation process
2012	5,910	-1.1%	estimation process
2013	5,855	-0.93%	estimation process
2014	5,832	-0.39%	estimation process
2015	5,727	-1.8%	estimation process
2016	5,710	-0.3%	estimation process
2017	5,694	-0.28%	estimation process
2018	5,736	0.74%	estimation process
2019	5,739	0.05%	estimation process
2020	5,716	-0.4%	estimation process

Comitatul Putnam, Comte de Putnam, Comté de Putnam, Condado de Putnam, Condado han Putnam, Contea di Putnam, Hrabstwo Putnam, Okrug Patnam, Patnam, Patnem, Patnem srjan, Putnam, Putnam Comitatus, Putnam Kun, Putnam Kūn, Putnam konderria, Putnam megye, Putnum, Quan Putnam, Quận Putnam, mqatʿt bwtnam, pattonamu jun, pu te nan xian, putanama ka'unti, shhrstan patnm aylynwy, Округ Патнам, Патнам, Патнем, Путнъм, Պատնեմ շրջան, شهرستان پاتنم، ایلینوی, مقاطعة بوتنام, پتنام کاؤنٹی، الینوۓ, پٹنم کاؤنٹی، الینوائے, পুতনাম কাউন্টি, パットナム郡, 普特南縣

People born in Putnam County (2)

People born in Putnam County, including politician Parish L. Willis, traveler, journalist Mildred Amanda Baker Bonham, .

More notable people

Other places with the same name (8)

Putnam County, New York county in Florida, United States. with a population of 98,532 people.
Putnam County, Tennessee county in Tennessee, United States. with a population of 80,929 people.
Putnam County, Florida county in Florida, United States. with a population of 74,815 people.
Putnam County, West Virginia county in West Virginia, United States. with a population of 56,428 people.
Putnam County, Indiana county in Indiana, United States. with a population of 37,469 people.
Putnam County, Ohio county in Ohio, United States. with a population of 33,654 people.
Putnam County, Georgia county in Georgia, United States. with a population of 22,520 people.
Putnam County, Missouri county in Missouri, United States. with a population of 4,688 people.

Illinois Other Counties (more counties)

County Name	Population	Title
Cook County	5,108,284	County in Illinois, United States
Chicago	2,677,643	The third most populous city in the United States and the center of the Chicago metropolitan area.
DuPage County	917,481	County in Illinois, United States
Lake County	693,593	County in Oregon, United States
Will County	688,726	County in Illinois, United States
Kane County	531,010	County in southern Utah, United States
McHenry County	305,888	County in Illinois, United States
Winnebago County	281,295	County in Illinois, United States
Madison County	262,635	County in Montana, United States
Saint Clair County	258,046	The County of St.
Champaign County	209,192	County in Illinois, United States
Aurora	196,383	The second most populous city in Illinois.
Sangamon County	193,882	County in Illinois, United States
Peoria County	177,652	County in Illinois, United States of America
McLean County	171,256	County in North Dakota, United States
Naperville	147,986	The second most populous city in Illinois.