How many people live in Logan County, IL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 27,500 people living in Logan County, IL. That makes Logan County the 49th-most populous county in Illinois. It is home to 0.22% of people living in the state.
27.5K
population of Logan County, IL (2024)
0.22%
County share of the Illinois population (2024)
About 27,500 people lived in Logan County, IL in 2024.
Population estimates, 2000–2024
What are Logan County, IL’s age demographics?
About 5,600 Logan County residents are aged 65 and older in 2024. That represents 20.3% of its population. For comparison, the age group represents 17.9% of Illinois’s population and 18% in the US overall.
Another 5,200 Logan County residents, or 19% of the population, were children under 18. For comparison, the age group represents 21.2% of Illinois’s population and 21.6% in the US overall.
A lower share of Logan County, IL's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Logan County, IL’s racial and ethnic demographics?
Non-Hispanic white residents make up 85.9% of the Logan County, IL population, higher than the national share of 57.5%.
In contrast, Logan County’s Hispanic population accounts for 3.8%, below the 20% nationwide, and the non-Hispanic Asian population makes up 0.74% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Logan County, IL has a higher share of a non-Hispanic white population than Illinois as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Logan County, IL is Lincoln with about 6,900 residents in 2024.
Cities and towns in Logan County, IL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Lincoln (pt.) | 6,866 |
| 2. | Lincoln (pt.) | 6,177 |
| 3. | Atlanta | 1,634 |
| 4. | Mount Pulaski | 1,506 |
| 5. | Chester | 647 |
| 6. | Aetna | 454 |
| 7. | Emden | 454 |
| 8. | Eminence | 385 |
| 9. | Latham | 323 |
| 10. | Middletown | 323 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
