Hamilton mayor Julie Hardaker will not seek re-election.
The two-term mayor announced this afternoon she would be leaving the council at the end of this term. She was elected in 2010.
Ms Hardaker was elected following a tightly-fought race with incumbent Bob Simcock. She campaigned to sort out council's debt, largely caused by poor financial decisions including hosting the Hamilton V8 Supercars event.
Ms Hardaker said it was a tough decision.
"It is tempting to stay on and be part of the exciting growth opportunities in front of Hamilton but I have achieved what I set out to do," she said.