Sligo Co Councillor Seamus O'Boyle died suddenly yesterday evening.
The People Before Profit politician is believed to have had a heart attack while driving his van at around 5pm in the Temple St area of Sligo town.
The 57-year-old’s van crashed into a house.
He was brought to Sligo Regional Hospital where he died a short time later.
Sligo Municipal District Mayor Thomas Healy paid tribute to Mr O'Boyle's work for the community, especially in north Sligo town.
Mr Healy said: "He will be sadly missed by his community where he was loved and respected."
In a statement tonight Sligo Co Council members expressed their shock and regret at Mr O'Boyle’s death.
He was elected to the council in 2014. He served as deputy mayor on the newly established Sligo Municipal District, and also served on the board of the Model, Sligo Harbour Advisory Committee, and the Regional Health Forum West.
He had a wide range of community interests, was involved in many voluntary organisations.
Cathaoirleach of Sligo Co Council Councillor Rosaleen O'Grady was a close friend, and she paid tribute to Mr O'Boyle for being a "committed and hardworking representative for his community. He had his roots in one of Sligo's oldest communities, and he served them with great distinction. He will be sorely missed by his family and many friends."
Chief Executive of the council Ciaran Hayes said that "right from his first day as a Councillor, Seamie treated everyone - fellow Councillors and members of staff - with the utmost courtesy and respect.
"He took a keen interest in a wide range of projects, and he always made an in important contribution to any discussions in the Council Chamber.
"He is a great loss to this Council, but more importantly, will be missed as a devoted husband and father.”
Mr O'Boyle was married with four grown-up children and lived in the Forthill area of the town.