He is survived by his wife Elaine, children Jack, Terry and Nancy, and seven grandchildren.
Northland Regional Council chairman Bill Shepherd said Mr Bowman's death was a loss to the Far North and the region as a whole.
He had represented the regional council's northernmost constituency, Te Hiku, since successfully contesting Te Hiku constituency in the 2013 local body elections.
"Dennis was very much an iconic member of the community he represented and his long-standing understanding of it - and the wealth of local knowledge he had accumulated over many years - was greatly appreciated and a great asset to council both locally and at a region-wide level over the past year."
His regional council roles had included membership of the Environmental Management Committee and Te Taitokerau Maori Advisory Committee, as well as important local river liaison committee work.
"Our sympathies and thoughts are with his family, including his wife Elaine and their children and grandchildren," Mr Shepherd said.
Mr Shepherd said a full regional council meeting scheduled in the Te Hiku constituency - which Mr Bowman had been keenly anticipating - would go ahead as planned at Taipa on October 21.
"Dennis was looking forward to that meeting and had been liaising with staff to include a familiarisation tour of an important Far North local industry prior to that meeting. That tour will go ahead too."
A by-election to fill the Te Hiku vacancy left by Mr Bowman's death is expected to be held in early 2015.