Cllr James Pat McDaid has replaced Councillor Gerry McMonagle as the Mayor of Letterkenny Municipal District.
He described his selection as a great honour, and thanked his loyal supporters and his family.
The Fianna Fáil councillor said that his priority is increasing investment in the area.
He hopes to tackle a number of issues currently faced by the Letterkenny area, including roads, housing and the health service.
Being a young councillor and getting this role so early is a huge honour for me," he said.
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