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Routing Number: 302386765

Our History

During the 1960s in Southwest Wyoming, FMC Corporation was mining something called trona ore. Trona ore is used to make soda ash, which is a component in making products such as glass, laundry detergent, and baking soda.
After a significant number of employees were hired by FMC Corporation, the desire for a credit union became apparent. On July 16, 1963, FMC Employees Federal Credit Union was born.

From 1963 to 1988, FMC Corporation was the only select employment group banking with FMC Employees Federal Credit Union. That all changed in 1989, when FMC Employees Federal Credit Union merged with Stauffer Big Island Federal Credit Union and became known as Trona Valley Federal Credit Union, serving a variety of Select Employee Groups (SEGS) and other organizations.

In 1999, we received our community charter. This allowed us to serve any individual who lives, works, worships, or attends school in Southwest Wyoming.

In 2012, we received approval to expand our membership, offering services and products in ten counties in Wyoming and Utah. Sweetwater, Sublette, Lincoln, Uinta, Carbon, and Teton Counties in Wyoming. Also, Rich, Morgan, Summit, and Daggett Counties in Utah.

September 20th, 2023, marked another expansion, which includes all counties in the state of Wyoming and counties in Idaho, Colorado, and Utah. In Idaho, Bannock, Bear Lake, Bingham, Caribou, Franklin, Power, and Teton. In Colorado, Garfield, Moffat, Rio Blanco, and Routt. In Utah, Duschesne and Uintah county. 

Today, Trona Valley is over $300,000,000 in assets, with more than 20,000 members and remains a member-owned, not-for-profit cooperative committed to the credit union philosophy of “People Helping People.”