Duncan, Illinois
Cities, Towns, Villages near Duncan
| City | Population |
| Abington | |
| Aledo | |
| Alexis | |
| Duncan | |
| Eliza | |
| Greene | |
| Joy | |
| Keithsburg | |
| Matherville | |
| New Boston | |
| North Henderson | |
| Reynolds | |
| Seaton | |
| Sherrard | |
| Viola |
| City | Population |
| Abington | |
| Aledo | |
| Alexis | |
| Duncan | |
| Eliza | |
| Greene | |
| Joy | |
| Keithsburg | |
| Matherville | |
| New Boston | |
| North Henderson | |
| Reynolds | |
| Seaton | |
| Sherrard | |
| Viola |
Population - 299
The median age for residents in Duncan, IL is 40.3 (this is older than average age in the U.S.).
Families (non-single residences) represent 76.4% of the population, giving Duncan a higher than average concentration of families.
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