Originally chartered in 1954 as the Dallas Postal Credit Union for U.S. Postal Service employees and their families, the institution rebranded to Lighthouse Credit Union in 2021. This change reflected its expanded field of membership to a wider community. As a not-for-profit financial cooperative, it is owned and operated by its members, with a mission to serve as their "guiding light to financial success" by offering competitive rates, a range of personal banking services like loans, savings, and checking accounts, and prioritizing member financial well-being over profits.