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Grinnell State Bank Locations

814 4th Ave
Grinnell, IA 50112
(641) 236-3174
Grinnell Hours
5601 Merle Hay Rd
Johnston, IA 50131
(515) 278-6300
Johnston Hours
1101 Court Ave
Marengo, IA 52301
(319) 642-5511 | Bank
(319) 642-5514 | Insurance
Marengo Hours
205 E Broadway St
Polk City, IA 50226
(515) 984-6211
Polk City Hours

Convenient Online & Mobile Banking

Check out all of our options that make banking fit into your life.


Get Started! Open your accounts in just 15 minutes.

Not sure what you need? Check out Simply Banking and open your accounts online or in person at any of our four locations.

  • Financial Advisors, Loan Officers & Insurance Agents working under the same roof.
  • Mastercard Debit Cards
  • No Monthly Fees on Debit Cards

Simply Switch

The best accounts bundled to make your banking experience simple.

Combine the smarter way to save with the convenience of the no minimum average balance checking with our Simply Savings and Simply Checking accounts.

Earn up to 10x More*

With Simply Savings, simply deposit your money and save up to 10x the *FDIC national average savings rate on up to $25,000. Enjoy high-yield savings without the term limits.

No Minimum Average Balance

With Simply Checking, dipping below your average account balance doesn’t result in enormous fees. With monthly service fees as low as $0.50 per month, you can enjoy your money your way.

Upgrade To Save On Fees

With Preferred Checking, you can wave (waive) monthly service fees goodbye by maintaining the Average Available (collected) Balance! Learn more about how to enjoy your money and make your accounts work for you with preferred checking. *Inactivity fees may still apply.

Simply Smarter Business

Simply Savings for business…don’t take it “personal”!

A savvy, high-yield business savings account that offers your business the ability to start earning a higher interest rate, up to 10x the FDIC national average, on your excess funds with an interest rate tiered based on your account balance. Learn more about our high yield business savings account.

Grinnell State Bank Wealth Management Team

Here to be your partner on your financial journey.

Whether you’re looking to invest, needing advice about how to save, or wanting a comprehensive look at your finances, we have the services & products backed by a team of advisors with over 78 years of combined experience, we will work with you to meet your financial goals.

  • 24/7 Access to the Investment Platform
  • Knowledgeable advisors, each with many years of experience
  • A Financial Planning Tool you can use anywhere
  • Performance Reviews at Request

Give us a call at 641.260.2GWM or click below to learn more.

Investment products are not FDIC insured, are not bank guaranteed, and may lose value.

Phone over Iowa

Real Humans Answer Your Calls

Imagine big bank products and services without those irritating automated phone prompts. Grinnell State Bank is proud to offer customer service with the small-town touch. Talk to you soon!

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