36th. That's where Forbes ranks Frankfort, Illinois on its list of the fastest-growing suburbs in the country. Car insurance in Frankfort still averages around $1,870 a year for full coverage, well under the roughly $2,300 Illinois statewide figure, but that growth ranking is reshaping the village underneath an otherwise quiet, historic-downtown profile.

Illinois minimum liability: 25/50/20 ($25,000 bodily injury per person, $50,000 per accident, $20,000 property damage), plus mandatory uninsured/underinsured motorist coverage. Statewide average: roughly $650/yr minimum coverage, $2,300/yr full coverage. Regulator: Illinois Department of Insurance.

A Village Growing Faster Than Almost Anywhere Else

Frankfort counted 20,296 residents at the 2020 Census, and the Chicago Metropolitan Agency for Planning expects that number to climb past 31,000 by 2050. Forbes has cited the village among the nation's 36th-fastest-growing suburbs, a ranking built on exactly that kind of sustained new-home construction in a Will County village that was still mostly farmland a few decades ago.

None of that moves Illinois' liability floor, but it does change the mix of drivers on Frankfort's roads. New subdivisions bring newly licensed teen drivers, second and third household vehicles, and more daily trips on streets that weren't built for today's traffic counts — all factors that feed into collision claims frequency over time even as the statewide minimum stays fixed at 25/50/20.

Breidert Green and the Old Plank Road Trail

Frankfort's historic downtown sits where the 22-mile Old Plank Road Trail crosses several village streets, funneling cyclists and pedestrians past Breidert Green at Kansas and Oak Streets. From May through October, that corner hosts a Sunday farmers market, plus summer concerts and car shows that draw crowds on top of the regular trail traffic.

None of that shows up as a line item on a declarations page, but weekend crossings and event crowds around downtown Frankfort add low-speed, stop-and-go exposure that differs from a typical weekday commute — the kind of local pattern that feeds into how carriers read collision claims over time.

Income Keeps the Comprehensive Side Quiet

Frankfort's median household income was $140,731 at the 2020 Census, with a more recent 2023 American Community Survey estimate putting it closer to $137,651 — among the higher figures in Will County. Liability limits don't change based on income, but a higher median household income typically tracks with fewer theft and vandalism claims, and that lower claims frequency is very likely the bigger reason Frankfort's full-coverage average runs below the state figure, outweighing whatever extra exposure the growth and downtown event traffic add.

What Illinois Requires, Growth or Not

None of Frankfort's local factors change the statewide floor. Every driver here still needs 25/50/20 liability at minimum, plus uninsured/underinsured motorist bodily injury coverage at the same limits, built into every Illinois policy unless a driver waives it in writing. Illinois is also an at-fault state, so whoever causes a crash in Frankfort pays for it through their own liability coverage, with no PIP cushion like true no-fault states provide.

Getting an Accurate Quote in Frankfort

  • Report your real household driver count: a growing family with a newly licensed teen changes a quote more than a village-wide average does.
  • Insure to actual vehicle value: comprehensive and collision limits should match what a newer car in a growing, higher-income suburb actually costs to replace.
  • Confirm your uninsured motorist coverage: it's mandatory at your liability limits on every Illinois policy, Frankfort included.
  • Compare at least three quotes. See our guide to comparing car insurance quotes for what to check beyond the headline price.