Helping you build what’s next.

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Proudly voted one of San Antonio’s top credit unions!

  • Earn more on your money
  • Pay less in fees
  • Get real guidance from a local, trusted partner

Limited Time Special Offers

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New Checking & New Adventures

Tailgate & Trail Grilling Sweepstakes*

Opening your first Firstmark checking account could lead to your next outdoor adventure. Open a new consumer checking account between September 7 and October 25, 2026, complete the entry form, and you’ll have a chance to win our Tailgate & Trail Grilling Package.*

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Auto Refinance Savings

Rates as Low as 4.99% APR & Get $200 Cash Back**

Lower your rate. Lower your payment. Plus, receive a $200 cash-back deposit when you refinance your vehicle with Firstmark Credit Union and meet qualifying requirements.** 

Why Join Firstmark

Hear From Our Members

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Join Online

Joining is easy. Most people finish in under 10 minutes.

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Join By Phone

Give us a call and will complete your application over the phone.

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Join In Person

We’d love to see you, visit a branch we will set you up with an account.

Supporting Education

The Firstmark Foundation is a non-profit, 501(c)(3) public charity focused on giving back to the education community.
Firstmark Credit Union, the Foundation, and Power of the Dollar® members have collectively given:

$145,000

Education Grants
Since ’08

$420,000

High Impact Grants
Since ’21

$345,000

Scholarships
Since ’94

NCUA Insurance Coverage Booklet – Your savings federally insured to at least $250,000 and backed by the full faith and credit of the United States Government.

Let's Get Started

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