Rimrock Credit Union is a member-owned, not-for-profit cooperative based in Billings, Montana, serving Yellowstone County. Membership is open to City of Billings and county employees, Montana-Dakota Utilities workers, SuperValu employees, affiliated union members, adjoining-county public employees, local business license holders, and their families. Services include checking, savings, CDs, loans, and online banking.

Rimrock Credit Union has served Billings and Yellowstone County families for generations, offering the personal touch of a hometown cooperative with the modern conveniences today's members expect. As a not-for-profit, member-owned institution, Rimrock returns earnings to members through competitive dividend rates, low loan rates, and products like Kasasa checking and savings, share certificates, auto loans, and home loans. Whether you're opening your first savings account or refinancing a vehicle, Rimrock puts members first. On top of banking locally with Rimrock, members can also use Fluz to earn cashback and rewards on everyday purchases, gift cards, and bill payments, stretching every dollar further.