Duncan is a city located in Illinois. Duncan has a 2024 population of 254. Duncan is currently declining at a rate of -0.39% annually and its population has decreased by -1.55% since the most recent census, which recorded a population of 258 in 2020.
The average household income in Duncan is $79,732 with a poverty rate of 5.19%. The median age in Duncan is 48.9 years: 35.3 years for males, and 57.6 years for females.
According to the most recent ACS, the racial composition of Duncan was:
White
Black or African American
Native American
Asian
Native Hawaiian or Pacific Islander
Other race
Two or more races
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 121 | 2.23 | 100 | 0 |
| Married | 84 | 2.77 | 100 | 0 |
| Non Family | 37 | 0 | 100 | 0 |
| Male | 0 | 0 | 0 | 0 |
| Female | 0 | 0 | 0 | 0 |
2.77
Average Family Size
2.23
Average Household Size
100.0%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among white people with a rate of 94.26%.
The highest rate of bachelors degrees is among white people with a rate of 16.75%.
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
100% of Duncan residents speak only English, while 0% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0% of the population.
rate
5.19%
Overall Poverty Rate
5.07%
Male Poverty Rate
5.3%
Female Poverty Rate
The race most likely to be in poverty in Duncan is White, with 5.19% below the poverty level.
The race least likely to be in poverty in Duncan is White, with 5.19% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0%. Among those working part-time, it was 17.95%, and for those that did not work, the poverty rate was 7.95%.
Married
Widowed
Divorced
Separated
NeverMarried
84.7%
Overall Marriage Rate
92.2%
Male Marriage Rate
79.0%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 20-34, while the female age group most likely to be married is 20-34.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
0%
Veteran Poverty Rate
54.84%
Veteran Disability Rate
LaborForceParticipation
57.9%
Labor Force Participation
57.9%
Employment Rate
0%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
75.19%
Born in Duncan
100%
Native Born
0%
Foreign Born
0%
Non Citizen
0%
Naturalized
100% of Duncan residents were born in the United States, with 75.19% having been born in Illinois. 0% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 249 | -1 | -0.4% |
| 2028 | 250 | -1 | -0.4% |
| 2027 | 251 | -1 | -0.4% |
| 2026 | 252 | -1 | -0.4% |
| 2025 | 253 | -1 | -0.39% |
| 2024 | 254 | -1 | -0.39% |
| 2023 | 255 | -1 | -0.39% |
| 2022 | 256 | -1 | -0.39% |
| 2021 | 257 | -1 | -0.39% |
| 2020 | 258 | 4 | 1.57% |
| 2019 | 254 | -1 | -0.39% |
| 2018 | 255 | -1 | -0.39% |
| 2017 | 256 | 0 | 0% |
| 2016 | 256 | -4 | -1.54% |
| 2015 | 260 | -2 | -0.76% |
| 2014 | 262 | -3 | -1.13% |
| 2013 | 265 | -3 | -1.12% |
| 2012 | 268 | -2 | -0.74% |
| 2011 | 270 | -1 | -0.37% |
| 2010 | 271 | 0 | 0% |