GNB Bank is a locally owned, community bank with a focus on friendly, personal service from people you know and trust. GNB Bank is a commercial bank, state charter and Fed member, supervised by the Federal Reserve (FRB). GNB Investments offers stocks, mutual funds, bonds, individual retirement accounts, annuities and 529 college savings plans. GNB Insurance offers a variety of insurance products, including life, health, long term care, property and casualty, and agriculture and crop insurance.
Main Bank
529 G Ave, Box 246
Grundy Center, IA 50638
Telephone: 319-824-5431
Toll Free: 800-545-0172
Fax: 319-824-3824
Loan Bank
510 F Ave, Box 246
Grundy Center, IA 50638
Telephone: 319-824-5431
Toll Free: 800-545-0172
Fax: 319-824-6795
Conrad
103 E Center St, Box 400
Conrad, IA 50621-0400
Telephone: 641-366-3898
Toll Free: 866-456-3898
Fax: 641-366-3895
Marshalltown
2504 S 2nd St, Box 736
Marshalltown, IA 50158
Telephone: 641-753-4040
Toll Free: 855-493-9883
Fax: 641-753-4110
Manchester
300 E. Main St, Box 439
Manchester, IA 52057
Telephone: 563-927-3814
Toll Free: 800-313-3814
Fax: 563-927-6741