Illinois · United States
Frankfort population
18,653people · latest figure
Frankfort has a population of 18,653, making it the 2407th largest place we list in United States. It is in Illinois.
Frankfort holds under a tenth of one per cent of United States's 349,035,494 people. New York City, the largest place we list there, is 472 times its size. Twenty years earlier the World Gazetteer recorded 27,051, a fall of 31%.
The 2005 figure comes from the World Gazetteer archive restored on this site. The two sources may draw the settlement's boundary differently, so treat the change as indicative rather than exact. Why figures differ.
Frankfort is in Illinois, which has 945 recorded places.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Islip | New York | 18,689 |
| Forest Park | Ohio | 18,676 |
| Westminster | Maryland | 18,670 |
| Niles | Ohio | 18,651 |
| Marshfield | Wisconsin | 18,620 |
| Lorton | Virginia | 18,610 |
All places in United States → · Illinois →
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.