Solarity Credit Union is a state-chartered, federally insured credit union headquartered in Yakima, Washington, serving members across Washington State with branches in Yakima, Wenatchee, Selah, and Moses Lake. Founded in 1951, it is a not-for-profit financial cooperative with approximately $824 million in assets and over 47,000 members. The credit union offers comprehensive banking services including savings accounts, checking, loans, mortgages, and online banking.

Sound Credit Union is a federally insured credit union based in Tacoma, Washington, founded in 1940 by 51 telephone workers. It serves over 170,000 members across the Puget Sound region with 24 full-service branch locations. The credit union operates as a locally-owned cooperative where members own a share of the institution.

South Carolina Federal Credit Union is a federally chartered credit union headquartered in North Charleston, South Carolina, serving approximately 149,000 members across 18 branches. Founded in 1936, it offers a full range of financial services including checking, savings, mortgages, auto loans, and credit cards. The credit union is not-for-profit and member-owned, with deposits insured by the National Credit Union Administration (NCUA).

Southern Energy Credit Union is a not-for-profit, full-service financial institution founded in 1953 (originally as APCO Employees Credit Union) and rebranded in 2025. It serves over 90,000 members across Alabama, Georgia, and Mississippi through 28 branches and digital banking platforms. The credit union is the second largest in Alabama and the largest state-chartered credit union in the state, with more than $3 billion in assets.

Southland Credit Union is a not-for-profit, community-chartered credit union founded in 1936 to serve Los Angeles County employees. Today it serves over 70,000 members across Los Angeles and Orange Counties with $1.3 billion in assets. The credit union offers a full spectrum of financial products including checking, savings, loans, mortgages, and investment services.

Southwest Airlines Federal Credit Union (SWACU) was founded in 1975 and is headquartered in Dallas, Texas, with branches in Texas and Arizona. The credit union serves approximately 60,000 members nationwide and holds over $800 million in assets as of March 2025. Originally established to serve Southwest Airlines employees, it has expanded to serve over 235 Select Employee Groups (SEGs) across multiple industries.

Space Coast Credit Union (SCCU) is a state-chartered, member-owned credit union headquartered in Melbourne, Florida, and regulated by the NCUA. Founded in 1951 as Patrick Air Force Base Credit Union, it is the third-largest credit union in Florida with over 685,000 members and $9 billion in assets. SCCU operates 67 branches across 34 Florida counties spanning the east coast from Flagler to Miami-Dade.

Spero Financial Federal Credit Union is a South Carolina-based credit union chartered in 1935 (originally as Greenville Telco Federal Credit Union, later SC Telco Federal Credit Union). It serves over 50,000 members across the Upstate and Midlands regions with more than $700 million in assets. The institution is a not-for-profit financial cooperative offering loans, deposits, investment services, and insurance products.

Spokane Teachers Credit Union (STCU) is a not-for-profit, member-owned credit union chartered in Washington, North Idaho, and Eastern Oregon, with headquarters in Liberty Lake, Washington. Founded in 1934, it has grown to serve over 300,000 members with more than $6 billion in assets and operates 49 branch locations across the region. Despite its name, STCU no longer restricts membership to teachers and welcomes members from all professions who meet geographic or other eligibility criteria.

SRP Federal Credit Union, headquartered in North Augusta, South Carolina, was founded in 1960 and serves over 200,000 members. It operates under a federal community charter and is insured by the NCUA. The credit union offers savings accounts, checking accounts, loans, and other financial services to residents and workers in a multi-county region spanning South Carolina and Georgia.