What is the population of Duncan?

The population of Duncan, IL is 250.

Where is Duncan located?

Duncan, IL is located at latitude 40.9836500 and longitude -89.7892700. It is in United States.

What is the elevation of Duncan?

Duncan, IL has an elevation of 201 meters (659 feet) above sea level.

What time zone is Duncan in?

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

What state is Duncan in?

Duncan is in the state of Illinois, United States.

What county is Duncan, IL in?

Duncan is in Stark County, Illinois.

How has the population of Duncan changed?

The population of Duncan, IL has decreased from 272 (2010) to 250 (2020), a change of -8.1%.

Duncan, IL - Geographic Facts & Maps

Duncan: unincorporated community in Illinois.

About

Duncan is a city located in the county of Stark in the U.S. state of Illinois. Its population at the 2010 census was 272. After 10 years in 2020 city had an estimated population of 250 inhabitants.

Quick Facts about Duncan

Population	250 (2020)
Country	United States of America
State	Illinois (United States)
County	Stark County
Latitude & Longitude	40.9837,-89.7893
Altitude	2,162 feet / 659 meters
Time Zone	Central Time Zone
Local time	11:05:52 (7th November 2026)
Population growth	-8.09% (2010-2020)
Weather	29℉ Mostly Clear 7-days weather

Geography

Duncan is located at 40°59'1"N 89°47'21"W (40.9836500, -89.7892700).

Duncan map

Click "full screen"

icon to open full mode. View satellite images

Weather

29°F

Mostly Clear

3 mph NNW Tonight

Mostly clear, with a low around 29. North northwest wind around 3 mph.

7-Day Forecast

Demographics

According to census records, the population of Duncan decreased by 8.09% in 10 years.

Year	Population	% Change	Method
2010	272	-	census
2011	270	-0.74%	estimation process
2012	267	-1.11%	estimation process
2013	265	-0.75%	estimation process
2014	262	-1.13%	estimation process
2015	259	-1.15%	estimation process
2016	256	-1.16%	estimation process
2017	256	0%	estimation process
2018	255	-0.39%	estimation process
2019	253	-0.78%	estimation process
2020	250	-1.19%	estimation process

Nearby Schools and Colleges

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

Code	Name	City	ZIP
147129	Methodist College	Peoria (IL)	61615
147165	Midstate College	Peoria (IL)	61614-3595
454999	Tricoci University of Beauty Culture-Peoria	Peoria (IL)	61614
143358	Bradley University	Peoria (IL)	61625-0001
148575	Saint Francis Medical Center College of Nursing	Peoria (IL)	61603-3783

Nearby Transit Stations (14)

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

Code	Name	Address	Type
KEE	Kewanee	Loomis and North Tremont Sts.	RAIL
PIA	Peoria, Illinois	6100 West Everett M. Dirksen Parkway	BUS
GBB	Galesburg station	225 South Seminary Street	RAIL
PCT	Princeton	107 Bicentennial Dr.	RAIL
MLI	Moline, Illinois	1200 River Drive	BUS

Nearby Post Offices

Closest post offices linked to Duncan.

Post Office Name	City	ZIP
Princevill Post Office	Princeville (IL)	61559
Wyoming Post Office	Wyoming (IL)	61491
Speer Post Office	Speer (IL)	61479
Laura Post Office	Laura (IL)	61451
Edelstein Post Office	Edelstein (IL)	61526

Other places with the same name (2)

Duncan, Oklahoma city in Oklahoma. with a population of 22,259 people.
Duncan, South Carolina human settlement in Spartanburg County, South Carolina, United States of America. with a population of 3,715 people.

Other cities in Stark County

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

City Name	Population	Title
Wyoming	1,253	Town in Illinois, United States
Toulon	1,144	Township in Stark County, Illinois

Duncan, Illinois