Pioneer Bank announces the purchase of Nicollet County Bank, located in St. Peter, has been finalized with approval from the Federal Reserve Bank of Minneapolis and the Minnesota Department of Commerce. Citizens Bank Group, Inc., parent company of Pioneer Bank, is now operating Nicollet County Bank. In addition, Nicollet County Bank has named Nathan S. Newhouse as its new President. A merger of Nicollet County Bank and Pioneer Bank is planned for August 2019.