| Dauphin County Area Agency on Aging | Committed to maximizing efficient use of resources to enhance the lives of all seniors residing in Dauphin County. |
| Daviess-Martin Rehabilitation Services – ARC | Enable individuals with disabilities and other challenges to attain self-independence and natural interdependence. |
| Davis County Health Department – Family Health and Senior Services Division | Provides services to citizens throughout their life spans through prevential programs and helping seniors remain active and healthy. |
| DAWN Center for Independent Living | Providing support to persons with disabilities throughout their lifespan so they can achieve their highest level of independence in their community. |
| DAWN Center for Independent Living – Washington | Providing support to persons with disabilities throughout their lifespan so they can achieve their highest level of independence in their community. |
| Dayle McIntosh Center – South County | |
| Dayle McIntosh Center (DMC) | |
| DC Center for Independent Living – SE Satellite | Assists DC residents with significant disabilities to live independently in their homes and in their communities. |
| Deadwood Long Term Services and Supports | Provide opportunities to enable older South Dakotans and adults who are disabled to live independent, meaningful, and dignified lives while maintaining close family and community ties. |
| Deaf Services Center | Deaf Services Center, Inc. (DSC) empowers those faced with language barriers by promoting access to communication. |