Tri Counties Bank, Mckinleyville Office Basic Info Reviews Routing Numbers Map & Direction Name: Tri Counties Bank, Mckinleyville Office Main Office: No Service: Full Service Brick and Mortar Office Location: 1640 Central Avenue Mckinleyville, California 95519 Humboldt County View other branches Phone: 707-839-8400 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121132394YY121135045YY121141738NY121142313YY121142766NY121143422YN From: To: