The polls are open between 08:00 and 20:00 today (Thursday).
People in seven areas of the island are eligible to vote- those in Castletown, three wards in Douglas, Garff's Lonan ward, Jurby, Onchan, Peel and Santon.
The elections were due to take place in April last year but were delayed because of coronavirus lockdown restrictions.
Those in isolation due to Covid-19 have been told they will not be able to cast their votes in the contest.
No more TT this year - and Dean Harrison awarded Senior win
Condition updates on three riders after Friday crashes
£10k raised by popular charity walk
Further two-hour delay to planned racing
Mountain closed because of pressure on emergency services
Douglas-based Taxi firm stops operating
Questions raised over government tender for hygiene inspections
Are too many buildings waiting to become protected?