Boyle said the decision shows how proud the borough is of Scott.
“Her Olympic gold medal was a truly historic achievement, not only for her and her family, but for our entire community,” Boyle said.
“To see a young woman from Coleraine, who learned to row here in the famous Bann Rowing Club, go on to reach the very pinnacle of world sport is extraordinary.”
She said the honour was “bestowed on Hannah in recognition of her dedication, resilience and excellence, as well as the inspiration she provides to young people across Causeway Coast and Glens”.
“She is a champion in every sense of the word, and this is a fitting way for us to say how immensely proud we are of her.”