The Citizens National Bank of Bluffton, Cnb Operations Center Branch Basic Info Reviews Routing Numbers Map & Direction Name: The Citizens National Bank of Bluffton, Cnb Operations Center Branch Main Office: No Service: Limited Service Administrative Office Location: 102 South Main Street Bluffton, Ohio 45817 Allen County View other branches Phone: 419-358-8040 Please enable JavaScript to view the comments powered by Disqus. From: To: