NEW YEAR’S EVE: Lobby will be open until 12:00 pm, Drive-up will be open until 3:00 pm Wednesday, December 31, 2025
NEW YEAR’S DAY: CLOSED Thursday, January 1, 2026
Any transactions after closing Wednesday, December 31 will post to your account on Friday, January 2.*
*This affects all wires/ACH files.
814 4th Avenue
PO Box 744
Grinnell, IA 50112
Monday – Thursday 8:30am – 4:30pm
Friday 8:30am – 5:00pm
Saturday Closed*
Monday – Friday 8:00am – 5:00pm
Saturday Closed*
24 Hour ATM located in the alley.
Grinnell State Bank (GSB) ATMs accept deposits for GSB customers only.
Grinnell (641) 236-3174
Toll Free (800) 236-3187
Fax (641) 236-4329
Lost/Stolen Debit Cards (800) 383-8000
Grinnell Wealth Management (641) 260-2GWM (2496)
*Customer Service Support is available by phone on Saturday mornings from 9:00am – 12:00pm via the Toll Free Number.
1101 Court Avenue
PO Box 168
Marengo, IA 52301
Monday – Thursday 8:30am – 4:00pm
Friday 8:30am – 5:00pm
Saturday Closed*
Monday – Friday 8:00am – 5:00pm
Saturday Closed*
24 Hour ATM located in the bank entryway.
Grinnell State Bank (GSB) ATMs accept deposits for GSB customers only.
Marengo (319) 642-5511
Fax (319) 642-1111
Toll Free (800) 236-3187
Insurance (319) 642-5514
Lost/Stolen Debit Cards (800) 383-8000
*Customer Service Support is available by phone on Saturday mornings from 9:00am – 12:00pm via the Toll Free Number.
5601 Merle Hay Road
PO Box 200
Johnston, IA 50131
Monday – Friday 9:00am – 4:30pm
Saturday Closed*
Monday – Friday 8:30am – 5:00pm
Saturday Closed*
24 Hour ATM located in the drive-up.
Grinnell State Bank (GSB) ATMs accept deposits for GSB customers only.
Johnston (515) 278-6300
Toll Free (800) 236-3187
Fax (515) 278-6370
Lost/Stolen Debit Cards (800) 383-8000
*Customer Service Support is available by phone on Saturday mornings from 9:00am – 12:00pm via the Toll Free Number.
205 Broadway Street
PO Box 79
Polk City, IA 50226
Monday – Friday 9:00am – 4:30pm
Saturday Closed*
Monday – Friday 8:30am – 5:00pm
Saturday Closed*
24 Hour ATM located at the drive-up entrance.
Grinnell State Bank (GSB) ATMs accept deposits for GSB customers only.
Polk City (515) 984-6211
Toll Free (800) 236-3187
Fax (515) 984-6986
Lost/Stolen Debit Cards (800) 383-8000
*Customer Service Support is available by phone on Saturday mornings from 9:00am – 12:00pm via the Toll Free Number.
Monday | January 19, 2026
CLOSED
Any transactions after closing Friday, January 16 will post
to your account on Tuesday, January 20.
Monday | February 16, 2026
CLOSED
Any transactions after closing Friday, February 13 will post
to your account on Tuesday, February 17.
Monday | May 25, 2026
CLOSED
Any transactions after closing Friday, May 22 will post
to your account on Tuesday, May 26.
Friday | June 19, 2026
Open Normal Hours | Non-Processing
Any transactions after closing Thursday, June 18 will post
to your account on Monday, June 22.
Saturday | July 4, 2026
CLOSED
No phone support will be available.
**We will be open normal hours on Friday, July 3rd.**
Monday | September 7, 2026
CLOSED
Any transactions after closing Friday, September 4 will post
to your account on Tuesday, September 8.
Monday | October 12, 2026
CLOSED
Any transactions after closing Friday, October 9 will post
to your account on Tuesday, October 13.
Wednesday | November 11, 2026
CLOSED
Any transactions after closing Tuesday, November 10 will post
to your account on Thursday, November 12.
Thursday | November 26, 2026
CLOSED
Any transactions after closing Wednesday, November 25 will
post to your account on Friday, November 27.
Friday | November 27, 2026
Open until 12PM
Any transactions after closing Friday, November 27 will post
to your account on Monday, November 30.
Thursday | December 24, 2026
Open until 12PM
Any transactions after closing Thursday, December 24 will post
to your account on Monday, December 28.
Friday | December 25, 2026
CLOSED
Any transactions after closing Thursday, December 24 will post
to your account on Monday, December 28.
Thursday | December 31, 2026
Lobby open until 12PM | Drive-Up open until 3PM
Any transactions after closing Thursday, December 31 will post
to your account on Monday, January 4.
Friday | January 1, 2027
CLOSED
Any transactions after closing Thursday, December 31 will post
to your account on Monday, January 4, 2027.
We want to make banking easy for you with 24/7 access to your accounts and convenient access to services. Have 24/7 access to all of the following without having to step foot in the bank:
You are accessing a printable version of our Electronic Funds Transfer.
You are accessing a printable version of Grinnell State Bank’s Online Banking Terms and Conditions. There are hyperlinks appearing within the document to access additional bank policy information referenced by the link. The links are for reference only, please contact the bank directly to request a copy of the referenced information.
