List of mid-west-based insurance companies that offer auto insurance; large, medium and small. Probably missed a few.

Acuity Insurance Company

Allied Insurance (Nationwide Insurance Owned)

Allstate

American Family Insurance

Ameriprise Auto and Home Insurance (Ameriprise Financial Owned)

Auto-Owners Insurance

Cincinnati Insurance Company

CNA Financial (Commercial Auto/Fleet)

Country Financial

Encompass Insurance Company (Allstate Insurance Owned)

Erie Insurance Group

First Chicago Insurance Company

Foremost Insurance Company (Farmers Insurance Owned)

Grange Mutual Casualty Company

Horace Mann Educators Corporation

Kemper Corporation

Menota Auto Insurance (Kingsway Financial Services Inc Owned)

Meridian Security Insurance (State Auto Insurance Owned)

Nationwide Mutual Insurance Company

Progressive Corporation

Safe Auto Insurance Group

Safeway Insurance Group

Sentry Insurance (Commercial/Fleet, Personal Auto Nationally via Dairyland)

Shelter Mutual Insurance Company

State Auto Insurance

State Farm Insurance

Titan Insurance Company (Nationwide owned)

West Bend Mutual Insurance

Westfield Insurance