Korthase Flinn is one of northern Michigan’s largest independent insurance and financial services firms. We began as a family-owned business in 1926 and while we have grown substantially, we continue to carry on the legacy of client trust and superior  personal service that our company was founded on. Today we operate five offices and service over twenty thousand clients throughout the Midwest.

KorthaseFlinn's 2023 Summer Hours wil be in effect from Monday, May 22 until Friday, September 1. 
We take this opportunity to allow our associates to enjoy all that Northern Michigan's short summers have to offer.

On Friday afternoons, staff wil be available by phone and email to meet your needs though our offices will be closed.

Summer In-Person Office Hours:

  • Monday through Thursday: 8:30am - 5:00pm
  • Friday: 8:30am - 12:30pm

Friday Phone and Email Support Hours:

  • Friday: 12:30pm to 5:00pm with staff available to meet your needs by phone and email.

Boyne City

1150 Boyne Avenue
Boyne City, MI 49712
Phone: (231) 582-6512
Fax: (231) 582-7130


1098 Bay View Rd.
Petoskey, MI 49770
Phone: (231) 348-8121
Fax: (231) 582-7130

East Jordan

100 Main St., Suite 10
East Jordan, MI 49727
Phone: (231) 536-2268
Fax: (231) 582-7130


711 W. Main St.
Gaylord, MI 49735
Phone: (989) 732-5661
Fax: (231) 582-7130

Traverse City

502 Railroad Ave.
Traverse City, MI 49686
Phone: (231) 946-8120 
Fax:  (231)582-7130

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