Yes. When shopping for car insurance, you'll notice that rates vary by region and that state laws dictate which coverage is required on your policy and what the minimum limits are, as well. There are plenty of good insurance companies that operate regionally or only in a select amount of states.
For example, Erie Insurance and Auto-Owners Insurance are top-rated carriers with excellent rates, a low number of complaints and superb customer satisfaction, but they operate in fewer states than other major insurers. Auto-Owners offers coverage in only 26 states, while Erie offers it in just 12.