Blair Henningsgaard has a long history of contributing to the Astoria community, including:
- Member – State Professional Responsibility Committee, 2013-present
- Member – Clatsop County Commission, 1988-1990
- Member – Astoria City Council, 2002-2010
- Director – UO Alumni Association Board, 1987-1993
- Director – Lower Columbia Hospice Board, 1984-2006
- Member – Clatsop County Home Health Advisory Committee, 1992-1994
- Member – Lower Columbia Home Health Policy Board, 1994-1996
- Member – Lower Columbia Naval Task Force, 1988-1992
- Director – Clatsop County Red Cross, 1984-1988
- Director – Astoria YMCA Board, 1983-1986
- Member – Astoria Landmarks Commission, 1984-1988
- Member – Clatsop County Board of Equalization, 1988-1991
- Member – Clatsop County Charter Review Committee, 2006
- Director – Clatsop County Historical Society, 1993-1998
- President – Clatsop County Historical Society, 1998
- Director – Astoria Golf & Country Club, 1996-1999
- President – Astoria Golf & Country Club, 1999
- Member – Astoria Rotary, 1984-2002
