Desert Financial Credit Union - South Mountain Share: Credit Unions Desert Financial Credit Union - South Mountain Visit Website 3230 E. Baseline Rd., Ste. 115 Phoenix, AZ 85042 (602) 335-4587 (602) 634-4587 (fax) About Map About Serving the South Mountain area with banking and investment services that are open for membership to all residents of Maricopa County. Open Monday through Saturday with convenient, extended hours to m What's Nearby? Distance: 5 10 15 20 25 50 mi.