The University of California, Merced is accredited by the Accrediting Commission for Senior Colleges and Universities of the Western Association of Schools and Colleges, 985 Atlantic Avenue, #100, Alameda, CA, 94501, Phone: 510-748-9001.  The Commission's action letter granting initial accreditation can be found here. 

Details of our accreditation process culminating in initial accreditation are available in the sidebar links.  The official letter is available here.