Community Campus - call IPC at 605-367-7900
Prairie Freedom Center - http://www.pfcil.org/locations.aspx
Sioux Falls Disablilities Awareness Commission - 605-367-8740 http://www.siouxfalls.org/
South Dakota Department of Human Services - http://dhs.sd.gov
Parent Connection - http://www.sdparent.org/
Developmental Disabilities Council (DD Council) - http://dhs.sd.gov/ddc/
SD Advocacy - http://sdadvocacy.com
Center for Disabilities - http://www.usd.edu/cd/
Family Support - http://dhs.sd.gov/dd/Family/index.aspx
SD Coalition of Citizens with Disabilities - 1-800-210-0143 (V/TDD) http://www.sd-ccd.org/ 
People First Language or People First Language on AchieveSD.org

Other resources:
South Dakota 2-1-1 A simple way to connect people with 
human services www.211sd.org
South Dakota Connect - http://www.sdconnect.sd.gov