First National Bank of St. Ignace remains a true community bank to this day. The main banking office on North State Street in ... St. Ignace has existed in that block for over 130 years. The bank operates six branch offices in the eastern Upper Peninsula including Mackinac Island, Cedarville, Naubinway, Newberry, and two full-service branches in the St. Ignace area. Customers are also served online at www.fnbsi.com. We are incredibly proud of our tradition of service to the eastern Upper Peninsula and the Straits of Mackinac region. read more