U.S. insurance companies

This is a list of insurance companies based in the United States. These are companies with a strong national or regional presence having insurance as their primary business.

• 21st Century Insurance
• AccuQuote
• Aflac
• Alleghany Corporation
• Allied Insurance
• Allstate
• American Automobile Association
• American Family Insurance
• American Income Life Insurance Company
• American International Group (AIG)
• American National Insurance Company
• Americo Financial Life and Annuity Insurance Company
• Ameritas
• Amica Mutual Insurance
• Aon Corporation
• Assurant
• Assurity
• Auto-Owners Insurance
• AXA Equitable Life Insurance Company
• Bankers Life and Casualty Company
• Berkshire Hathaway
• California Casualty
• Capital Insurance Group
• Cincinnati Insurance Company
• CNA Financial
• Colonial Life & Accident Insurance Company
• Commerce Insurance Group
• Conseco
• Country Financial
• Chartis
• Chubb Corp.
• Encompass Insurance Company
• Equitable Life & Casualty Insurance Company
• Erie Insurance Group
• Esurance
• Everest Re Group
• Evergreen USA RRG
• Farmers Insurance Group
• Federated Mutual Insurance Company
• GAINSCO
• GEICO
• General Re
• Genworth Financial
• GMAC Insurance
• Guardian Life Insurance Company of America
• Hanover Insurance
• The Hartford
• HCC Insurance Holdings
• Hereford Insurance Company
• Hiscox Insurance Company Inc
• Infinity Property & Casualty Corporation
• Insurance Company of the West (ICW Group)
• International Fidelity Insurance Company
• Illinois Mutual
• Jackson National Life
• John Hancock Insurance
• Kemper Insurance
• K&K Insurance
• Knights of Columbus
• La Playa
• lgap Insurance
• Knights of Columbus Insurance
• Liberty Mutual
• Lincoln National Corporation
• Markel Corporation
• MassMutual Financial Group
• Merchants Insurance Group
• Mercury Insurance Group
• MetLife
• Mutual of America
• Mutual of Omaha
• Nationwide Mutual Insurance Company
• New Jersey Manufacturers Insurance Company
• New York Life Insurance Company
• Northwestern Mutual
• Ohio National
• OneBeacon
• Oxford Health Plans
• Pacific Life
• PEMCO
• Penn Mutual
• Primerica
• Principal Financial Group
• Progressive
• Protective Life
• Prudential Financial
• The Regence Group
• Reliance Insurance Company
• Response Insurance
• RLI Corp.
• Safe Auto Insurance Company
• Safeco
• Safeway Insurance Group
• Sentry Insurance
• Selective Insurance
• Seven Corners Inc
• Shelter Insurance
• Southern Aid and Insurance Company
• Standard Insurance Company
• State Farm Insurance
• Symetra
• Tri-State Consumer Insurance Company
• TIAA-CREF
• The Travelers Companies
• Uniguard - Headquarter in greater Seattle area
• United Auto Insurance Company
• Unitrin Direct Auto Insurance
• Unum
• Vantislife Insurance Company
• USAA
• Wawanesa Insurance USA (CA and OR)
• West Coast Life
• Western Mutual Insurance Group
• Western & Southern Financial Group
• Westfield Insurance
• Western Reserve Life Insurance Company
• White Mountains Insurance Group

Life Annuity

• Allstate
• American Family Insurance
• American Fidelity Assurance
• Amica Mutual Insurance
• Aviva
• AXA Equitable Life Insurance Company
• Bankers Life and Casualty
• Conseco
• Farmers Insurance Group
• Fidelity
• Genworth Financial
• ING Group
• Jackson National Life
• John Hancock Insurance
• Lincoln National Corporation
• MetLife
• Mutual of Omaha
• Nationwide Mutual Insurance Company
• Old Mutual
• Pacific Life
• Protective Life
• Prudential Financial
• Standard Insurance Company
• State Farm Insurance
• Thrivent Financial for Lutherans
• TIAA-CREF
• Transamerica Corporation
• UNIFI Companies
• United of Omaha
• Western & Southern Financial Group

Health insurance (major medical insurance)

• AARP
• Aetna
• American Family Insurance
• American National Insurance Company
• Amerigroup
• Anthem Blue Cross and Blue Shield
• Assurant
• Blue Cross and Blue Shield Association
• Celtic Insurance Company, subsidiary of Centene Corporation
• Centene Corporation
• Cigna
• Coventry Health Care
• EmblemHealth
• Fortis
• Golden Rule Insurance Company
• Group Health Cooperative
• GHI
• Health Net
• HealthMarkets
• HealthSpring
• Highmark
• Humana
• Independence Blue Cross
• Kaiser Permanente
• LifeWise Health Plan of Oregon
• Medical Mutual of Ohio
• Molina Healthcare
• Premera Blue Cross
• Principal Financial Group
• The Regence Group
• Shelter Insurance
• Thrivent Financial for Lutherans
• UnitedHealth Group
• Unitrin
• Universal American Corporation
• WellCare Health Plans
• WellPoint

Medicare

• Aetna
• American Family Insurance
• Bankers Life and Casualty
• Conseco
• Mutual of Omaha
• Premera Blue Cross
• Thrivent Financial for Lutherans
• Kaiser Permanente

Supplemental insurance

• Aflac
• Allstate
• American Fidelity Assurance
• Colonial Life & Accident Insurance Company
• Conseco
• Liberty National Life Insurance Company
• Mutual of Omaha

Supplemental health insurance

• Aflac
• Allstate
• MEGA Life and Health Insurance
• State Farm Insurance
• AARP

Travel insurance

• Access America, a brand of Mondial Assistance Group
• International Medical Group
• Seven Corners, Inc.
• Travel Guard
• Usa-Assist Worldwide Protection
• Aeromedevac
• Missionary Travel Association
• MediMundi Travel Directory

Workers' compensation

Assist Card

• Accident Fund
• American International Group (AIG)
• CompWest
• Erie Insurance Group
• Hanover Insurance
• The Hartford
• Liberty Mutual
• Merchants Insurance Group
• Missouri Employers Mutual
• Nationwide Mutual Insurance Company
• Penn National Insurance
• Sentry Insurance
• State Accident Insurance Fund
• State Compensation Insurance Fund
• State Farm Insurance
• Third Coast Underwriters (3CU)
• United Heartland
• WellPoint
• Zenith Insurance Company 

http://en.wikipedia.org/wiki/List_of_United_States_insurance_companies