"Councillor Hanley vacated the position at the start of this year following allegations against him on social media.
Secondary school teacher and cycling activist Alan Curran has been nominated by the Social Democrats to be co-opted to Galway City Council.
The news was shared on Twitter this morning, with Mr Curran saying he was feeling "apprehensive but excited" to start the new journey.
Mr Curran is the co-founder of Galway Cycle Bus, a dedicated school cycle route serving the Knocknacarra suburb of Galway City."