We will be CLOSED Monday, October 13, 2025 in observance of Columbus Day & Indigenous Peoples’ Day.

Any transactions after closing Friday, October 10, 2025 will post to your account on Tuesday, October 14, 2025.

*This affects all wires & ACH transactions.

About Us

Your Local Community Bank

Grinnell State Bank was organized in 1925 by Grinnell businessmen to be an independent community bank and is still fulfilling that role today. The Jones Family has owned and operated the bank since 1954 and continue that legacy with a fifth generation of family members on staff. The bank’s growth has been in business loans, personal Loans, Deposits and Locations with services in Grinnell, Johnston, Marengo, and Polk City.

Timeline

2025

2025

Fitzpatrick A. “Rusty” Jones is named Bank President

2025 – GSB celebrates 100 years

2025

Grinnell State Bank celebrates 100 years!

2018

2018

F. Austin Jones is named Bank President

2017

Grinnell State Bank purchases Augustine-Johnston Insurance Agency in Marengo

2016

2016

Consolidated our Johnston & Urbandale branches into our Johnston Branch

2015

Grinnell State Bank acquires Hamilton Insurance Agency in Grinnell

2013

2013

Grinnell State Bank Remodels Marengo Branch

2011

Grinnell State Bank acquires three locations in Johnston, Polk City & Urbandale – formerly Polk County Bank

2001

Grinnell State Bank purchases the book of business from Rohrer Insurance in Marengo

1999

1999

David Jones is named Bank President

1996

1996

Grinnell State Bank Remodels Grinnell Branch

1996

Grinnell State Bank acquires a location in Marengo – formerly Boatmen’s Bank

1990

Grinnell State Banks consolidates the Grinnell and Malcom branches into the Grinnell Branch

1972 – Bank President

1972 – Bank President

1972

F. Addison Jones is named Bank President

1972

1972

Grinnell State Bank expands the Grinnell Branch with a new, two-lane drive-up facility

1954

1954

Fred A. Jones purchases Grinnell State Bank from C.A. Frasier

1940

Grinnell State Bank opens a location in Malcom

1925

1925

Grinnell Businessmen Re-organize Grinnell Savings Bank into Grinnell State Bank as an independent community bank

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