Car insurance in Sherman, TX costs about $1,163 a year for minimum liability coverage and $1,953 a year for a fuller comprehensive policy, averaging out near $1,779 annually for a typical driver. Those figures still sit a little below the roughly $1,810 statewide average.

What's changed is the city underneath those numbers. Sherman spent decades as a stable, slow-growing Grayson County seat of around 44,000 people. It is now the site of one of the largest single manufacturing investments in Texas history, and the traffic, workforce, and housing pressure that comes with it are starting to show up in how insurers price the area.

Sherman Auto Insurance at a Glance

  • Minimum liability average: ~$1,163/yr ($97/mo)
  • Comprehensive coverage average: ~$1,953/yr ($163/mo)
  • Typical annual cost: ~$1,779/yr
  • State minimum required: 30/60/25 liability
  • Fault system: At-fault (tort) — Texas standard
  • Population: roughly 50,229 and growing

A Market Still Priced Below the State Average

For now, Sherman drivers pay less than the Texas norm on both ends of the coverage spectrum. Minimum liability at $1,163 a year and comprehensive at $1,953 a year both undercut what drivers in Dallas or Houston typically see, a pattern common to mid-size Texas cities where daily traffic volume and vehicle theft haven't caught up to the state's largest metros — yet.

The $30 Billion Reason Sherman Is Changing

Texas Instruments broke ground on a semiconductor megasite in Sherman in December 2025, part of a project the company says will eventually top $30 billion in investment and produce more than 100 million chips a day. It's one of the largest manufacturing buildouts in North Texas history, and it landed in Grayson County partly because Sherman sits close enough to Lake Texoma to support the enormous water demand that chip fabrication requires.

Large employers moving into a smaller city tend to raise both the number of drivers on local roads and the number of newer, higher-value vehicles registered there — both of which factor into how insurers set premiums. Our minimum vs. full coverage guide covers how to decide whether it's worth carrying more than the state floor if your commute is getting longer or busier.

Construction Traffic Meets a Small-City Road Grid

Sherman's road network wasn't built for a project of this scale. The US-75 corridor through town, along with the Highway 82 interchange that connects Sherman to Denison and points west, now carries construction crews, equipment haulers, and a fast-growing commuter base on top of the everyday traffic the city has always had.

  • New commuters, new patterns: Workers relocating for TI and its supplier network are unfamiliar with local roads, a risk profile insurers track differently than longtime residents.
  • Heavy-vehicle traffic: Construction and freight trucks tied to the megasite add larger vehicles to roads that previously saw mostly passenger cars.
  • Housing catching up late: New rooftops are still being built to keep pace with the workforce, which means many employees are commuting in from Denison, Whitesboro, and other Grayson County towns.

Sherman, Denison, and the Lake Texoma Factor

Sherman and its twin city, Denison, sit about eight miles apart on US-75, but insurers rate them separately by ZIP code. Denison leans more heavily on Lake Texoma's boat-trailer and weekend tourist traffic, while Sherman's driving patterns are shaped more by the TI site and the daily grind of the US-75/Highway 82 interchange. Either way, Grayson County as a whole sees a seasonal bump each spring and summer as lake traffic picks up on top of the industrial buildout.

What Texas Requires and How to Stay Ahead of Rising Rates

Sherman drivers carry the same 30/60/25 liability minimum as the rest of Texas: $30,000 in bodily injury coverage per person, $60,000 per accident, and $25,000 for property damage. Texas is an at-fault state, so whoever causes a crash is responsible for the damage, and insurers must offer uninsured/underinsured motorist coverage that drivers can only decline in writing.

With Sherman's population and traffic both climbing, locking in a rate now and comparing quotes from at least three carriers each renewal is a better strategy than waiting. Ask your insurer directly whether your ZIP code has been repriced for the TI-driven growth, and keep a clean driving record — it's the one factor a booming job market can't take away from you.