Welcome    to
      Post Oak Bank


Post Oak Bank & Allegiance Bank Complete Merger

As of October 1, 2018 Post Oak Bank is now a division of Allegiance Bank.

To learn more - Click Here.


Equifax Security Breach

We have received many calls from customers with concerns about the recently announced Equifax security breach.  While this is not a Post Oak Bank issue, we wish to be as helpful as possible to customers expressing concern.  Please click  Here for useful information from the Federal Trade Commission (FTC) about how to determine if your information was exposed and steps to take to help safeguard identities.

About Us

Post Oak Bank was founded in July 2004 by a group of experienced Houston bankers.  We recognized the opportunity to provide exceptional banking service with the Houston market- the type of service you expect from an independently owned bank.  Our employees, Directors, and Shareholders believe that being independent adds an element of pride and responsiveness that is hard to find in the banking industry today.


Post Oak Bank

  • Is owned and managed locally which allows us to be accessible, responsive, and flexible when it comes to making decisions.
  • Employs knowledgeable, mature bankers you can count on with experience in all aspects of banking.
  • Is financially safe and sound with a five star rating from BauerFinancial, Inc.
  • Provides an array of bank products and services that will meet the needs of businesses and individuals throughout the community.
  • Is committed to exceeding the expectations of our customers everyday.


Contact Us
There are many ways to reach us...

Call Us - 713-439-3900 or 1-866-997-1663

Online Banking/Bill Pay Help - 713-499-1800

Email Us - info@postoakbank.com

Automated Assistance - 24 hours a day, 7 days a week - 1-888-422-2311

Mail Correspondence

    Post Oak Bank
    P.O. Box 22009
    Houston, TX 77227-2009   

Report a Lost or Stolen Debit Card


Report a Lost or Stolen Credit Card





Take a look at Post Oak News!

Click here »

Mobile Banking

Mobile Banking

Anytime, anywhere. Post Oak Bank Mobile.

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Financial Calculators

Plan for your financial future!

Click here »

Security Corner

Security Corner

Tips and tricks to protect against fraud.

Click here »

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