Grinnell State Bank will be closed Monday, May 28, 2018 in observance of Memorial Day. Any transactions after close on Friday, May 25, 2018 will post to your account on Tuesday, May 29, 2018.

*This affects all wires/ACH files.


We are changing the way we provide Banking Services on Saturdays. As of July 2nd, 2018 our branches will no longer be open for in-branch services (Lobby and Drive-Up) on Saturdays.

Customer Service Support will be available by phone from 9:00 AM to Noon Via (800) 236-3187 *Option 0 or 8 for a bank representative*

Genuinely Local Since 1925
24/7 GSB Telebanking
Balances, Transfers, & Account Information
(800)­  411-­9331
Pin #: Last 4 Digits of Social Security
814 4th Ave
Grinnell, IA 50112
(641)­  236-­3174
5601 Merle Hay Rd
Johnston, IA 50131
(515)­  278-­6300
1101 Court Ave
Marengo, IA 52301
(319)­  642-­5511
Polk City
205 Broadway St
Polk City, IA 50226
(515)­  984-­6211


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