Bank On The Local Rock. Founded in 1892, RSNB Bank, formerly The Rock Springs National Bank, is one of the last remaining locally-owned community banks in Sweetwater County, WY. RSNB Bank provides virtually all types of deposit and loan products in Rock Springs, WY. Service and products include: • Checking and savings accounts • Individual Retirement Accounts (IRAs) • Health Savings Accounts (HSAs) • Certificates of Deposit • Consumer, commercial business and agricultural loans • Real estate loans We offer other financial services that include safe deposit boxes, escrows and trust services at our two convenient Rock Springs locations. Call RSNB Bank today for all your local banking needs.