The Milestone Foundation is grateful to the support it receives from state and local agencies and the general public, including:
- Department of Health and Human Services - Office of Substance Abuse
- Maine State Housing Authority
- City of Portland
- Department of Housing and Urban Development
- Various foundations including:
- Samuel Cohen Foundation
- Maine Community Foundation Rines/Thompson Fund
- William and Joan Alfond Foundation
- Maine Health Access Foundation
- Stephen and Tabitha King Foundation
- Betty Noyce Foundation
- Levine Family Trust
