Security First Bank Address: 614 W Main St, Mandan, ND 58554 Phone: (701) 667-0521 Hours: Mon: 9am-5pm Tue: 9am-5pm Wed: 9am-5pm Thu: 9am-5pm Fri: 9am-5pm Banks Other Businesses: Gate City Bank at 405 E Main St, Mandan, ND 58554 Dakota Community Bank & Trust at 4321 Memorial Hwy, Mandan, ND 58554 Ride Mountains at 1706 43rd Ave SE, Mandan, ND 58554 Hub International Mountain States at 200 1st Ave NW, Mandan, ND 58554