About one in seven drivers on U.S. roads carries no insurance at all, roughly 15.4% nationally in 2023. Nobody plans for the driver who hits them to be uninsured, but in some states it is closer to a coin-flip than a rare event. The share ranges from 5.7% in Maine, fewer than one in sixteen, to 28.2% in Mississippi, more than one in four. That gap is not random, and it is not free: you help pay for the uninsured drivers around you every time you renew.
How a stranger's lapsed policy lands on your bill
When an uninsured driver hits you, there is no other policy to bill. The money to fix your car and cover your injuries comes from your own uninsured/underinsured motorist (UM/UIM) coverage, which means insurers price that coverage for the risk in your state. The more drivers around you skip insurance, the more everyone who buys it pays to backstop them. It is one of the quieter reasons two states with similar roads and cars can post very different premiums.
This is also why UM/UIM is the most valuable line on your policy in a high-uninsured state, and close to an afterthought in a low one. In Mississippi, more than a quarter of the cars you pass may have nothing behind them; in Maine, almost all of them are covered.
The affordability trap
Here is the part that surprises people: the states with the most uninsured drivers are not simply the states with the most scofflaws. They are often the states where insurance eats the biggest share of a modest paycheck. Mississippi drivers spend 2.21% of the median household income on car insurance; Louisiana tops the country at 3.01%. When a mandatory purchase costs that much relative to what people earn, more of them let it lapse, and a lapsed policy is an uninsured driver.
That sets up a loop. High premiums push marginal drivers to drop coverage. More uninsured drivers raise the UM/UIM cost baked into everyone else's premium. Higher premiums push the next tier of drivers to drop coverage. It is slow, but it is real, and it is why the uninsured problem is stubborn in exactly the places that can least afford it.
The states with the most uninsured drivers
Share of drivers with no insurance in 2023, each state's average annual premium, and what that premium costs as a share of the median local income. Tap a state for its full insurance breakdown.
| # | State | Uninsured | Avg. premium | % of income |
|---|---|---|---|---|
| 1 | Mississippi | 28.2% | $1,395 | 2.21% |
| 2 | New Mexico | 24.1% | $1,301 | 1.74% |
| 3 | Michigan | 22.3% | $1,573 | 2.09% |
| 4 | Tennessee | 21.3% | $1,212 | 1.55% |
| 5 | Missouri | 20.7% | $1,323 | 1.68% |
| 6 | Florida | 20.6% | $1,994 | 2.54% |
| 7 | California | 20.4% | $1,418 | 1.28% |
| 8 | Colorado | 19.7% | $1,655 | 1.56% |
| 9 | Washington | 19.1% | $1,235 | 1.22% |
| 10 | Georgia | 19% | $1,746 | 2.08% |
Notice that the uninsured rate and the raw premium do not move in lockstep. Across all 50 states the correlation is real but loose (about r = 0.28). Mississippi is the tell: it has the highest uninsured rate in the country, yet only a mid-pack premium of $1,395, because its incomes are low enough that even a moderate premium is a heavy lift. Uninsured drivers are one ingredient in a premium, alongside no-fault systems, weather, and density, which we break down in our piece on why premiums vary 3x.
Why some states stay low
Maine (5.7%), Utah (6.2%), and Idaho (6.4%) sit at the bottom for the mirror-image reasons: lower premiums that are easier to keep paying, and coverage-verification systems that catch a lapse quickly. Enforcement design matters as much as the penalty on paper. New Hampshire is the odd case out, the one state that does not even require liability insurance, and still lands mid-pack at 10% because most drivers carry it anyway.
In a high-uninsured state, buy the coverage that protects you from everyone else. UM/UIM is the part of your policy that pays when the at-fault driver cannot, and it is cheap relative to what it covers. See exactly where your state stands, on uninsured drivers, premiums, and required minimum coverage, on the Driving Index.
Data sources
Uninsured-driver rates: Insurance Research Council, Uninsured and Underinsured Motorists, 2023 data.
Premiums and expenditure-to-income: NAIC 2022/2023 Auto Insurance Database Report (2023 combined premium), against Census median household income.
