1953 – Parents of children with mental retardation form study groups meetings in homes and churches

1959 – Parents form and incorporate the School of Hope for Mentally Retarded Children

1961 – Parents form and incorporate the Jackson County Association for Retarded Children (JCARC) and affilate with state and national organizations

1966 – JCARC purchase two acres on Valley View Drive, Medford (now the home of Living Opportunities) and open the first Sheltered Workshop in Southern Oregon.

1967 – JCARC opens the first pre-school in Oregon for children with DD

1968 – JCARC began plans for the Rogue Valley Opportunity Center on Valley View Drive

1970 – Rogue Valley Opportunity Center incorporates and opens as the complete workshop and training facility in Southern Oregon

1971 – Treasure II Thrift Ttore opened and continues to operate at 121 N. Central Avenue in Medford

1974 – A group from JCARC incorporates Living Opportunities (now a separate agency) and opens the first group home on Beatty Street in Medford.

1975 – JCARC changes to the Jackson County Association for Retarded Citizens (JCARC)

1980 – JCARC changes to the Association of Retarded Citizens of Jackson County (ARC)

1982 – Rogue Valley Opportunities Center dissolves

1991 – ARC began the Ken Wonderly Memorial Fund

1993 –  ARC Office opened and the first Executive Director was hired

1994 – The Respite Care Program implemented and a Family Service Coordinator was hired

1994 – ARC changes to The Arc of Jackson County (The Arc)

1998 – Transition House leased to house four young men with developmental disabilities and a care assistant

2001 – The Arc hosts Lifespan Respite Network of Jackson County

2001 – The Arc begins coordinating bi-monthly social activities with seven agencies in Jackson County

2002 – The Arc sponsors Troy's Recycling Program (program disolved in 2006)

2003 – The Arc leases Sara's House

2005 – Lifespan Respite Cooperative begins

2005 – The Arc creates an art studio for people with developmental disabilities located at 121 N. Central Avenue (progam now housed at the Rogue Art Gallery in Medford as of 2007)