Frankfort, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Frankfort, Illinois is 20,417 as of the 2023 American Community Survey, making it the 120th-largest city in Illinois. The median household income is $153,714, the median home value is $461,600, and the median age is 41.8.
The population has grown 18.6% since 2010 (17,846 → 21,160).
20,417
Population
1308
People / sq mi
$153,714
Median Income
$461,600
Median Home Value
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Frankfort covers 15.6 sq mi of land at 1308 people per square mile.
About Frankfort, IL
Homeownership is the standout figure in Frankfort: 94.7% of homes are owner-occupied, higher than the national rate. Frankfort is a city in Illinois with a population of 20,417.
Income is a real outlier — the median household pulls in $153,714, putting Frankfort near the top of US cities. Poverty is relatively low for US cities at 2.6%, below the national 12.4%. Home values run above average at $461,600, with typical rent around $2,175.
College attainment is above the local norm at 59.2%, above the national 35.0%. A solid 19.4% of workers are based at home, above the national 14.0%, and the average commute runs about 33 minutes each way.
The ownership rate anchors the housing story in Frankfort, and tends to move with the age structure and home-value figures above.
Frankfort village Population History (2010-2024)
The city of Frankfort village had a population of 17,846 in 2010 and 21,160 in 2024, a 18.6% growth over 14 years. The peak was 21,160 in 2024. Average annual growth rate: 1.23%.
21,160
Population (2024)
17,846
Population (2010)
21,160
Peak (2024)
1.23%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 17,846 |
| 2011 | 17,945 |
| 2012 | 18,054 |
| 2013 | 18,187 |
| 2014 | 18,414 |
| 2015 | 18,635 |
| 2016 | 18,842 |
| 2017 | 18,976 |
| 2018 | 19,144 |
| 2019 | 19,373 |
| 2020 | 20,312 |
| 2021 | 20,519 |
| 2022 | 20,706 |
| 2023 | 20,973 |
| 2024 | 21,160 |
Race & Ethnicity
| White | 79.3% |
| Black or African American | 10.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.1% |
| Two or More Races | 0.0% |
Economy & Income
$153,714
Median Household Income
$59,421
Per Capita Income
2.6%
Poverty Rate
2.4%
Unemployment Rate
Housing
$461,600
Median Home Value
$2,175
Median Rent
94.7%
Owner-Occupied
Education
98.3%
High School+
59.2%
Bachelor's+
Commute
4.3%
Drive Alone
71.8%
Public Transit
19.4%
Work From Home
33.1 min
Avg Commute
Community Profile
15.9%
Foreign Born
88.8%
Non-English at Home
3.7%
Veterans
6.0%
With Disability
97.3%
Health Insurance
97.4%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 25.3% |
| Finance, Insurance & Real Estate | 13.5% |
| Information | 10.9% |
| Manufacturing | 9.1% |
| Education, Health Care & Social Services | 8.0% |
| Construction | 5.8% |
| Retail Trade | 4.9% |
| Public Administration | 4.5% |
| Arts, Entertainment & Food Services | 2.9% |
| Transportation & Warehousing | 1.9% |
Largest cities in Illinois
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City rankings
Frequently Asked Questions
Frankfort, Illinois has a population of 20,417 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 120th-largest city in Illinois.
The median household income in Frankfort, Illinois is $153,714, with 2.6% of residents living below the federal poverty level.
The median home value in Frankfort, Illinois is $461,600, with median monthly rent at $2,175 and a homeownership rate of 94.7%.
The median age in Frankfort, Illinois is 41.8 years. The population is 51.2% male and 48.8% female.
The population has grown 18.6% since 2010 (17,846 → 21,160).
Frankfort village, IL Climate
Frankfort village, IL has an average annual temperature of 9.7°C (49°F) and receives about 954 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.7°C
Avg Temp
954
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -6° / 22° | 40 mm |
| February | -3° / 27° | 37 mm |
| March | 3° / 37° | 69 mm |
| April | 9° / 49° | 100 mm |
| May | 15° / 60° | 99 mm |
| June | 21° / 69° | 107 mm |
| July | 23° / 74° | 99 mm |
| August | 22° / 72° | 97 mm |
| September | 18° / 64° | 92 mm |
| October | 11° / 53° | 70 mm |
| November | 4° / 40° | 79 mm |
| December | -2° / 28° | 65 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Frankfort village, IL
The most comfortable months to visit Frankfort village, IL are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -10°C low). June is usually the wettest month.
Where to stay near Frankfort
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.