Exhibit 99.1

PRESS RELEASE

MACKINAC FINANCIAL CORPORATION DECLARES $.075 CASH DIVIDEND ON COMMON STOCK

Manistique, Michigan — Mackinac Financial Corporation (Nasdaq: MFNC), the bank holding company for mBank, today announced that on May 27, 2015, its Board of Directors declared a cash dividend of $.075 per common share, payable July 10, 2015 to shareholders of record June 25, 2015. The dividend is unchanged from the prior quarter’s dividend.

Mackinac Financial Corporation is a registered bank holding company formed under the Bank Holding Company Act of 1956 with assets in excess of $725 million and whose common stock is traded on the NASDAQ stock market as “MFNC.”   The principal subsidiary of the Corporation is mBank.  Headquartered in Manistique, Michigan, mBank has 17 branch locations; 13 in the Upper Peninsula, three in the Northern Lower Peninsula and one in Oakland County, Michigan.  The Corporation’s banking services include commercial lending and treasury management products and services geared toward small to mid-sized businesses, as well as a full array of personal and business deposit products and consumer loans.