However, Samoa's Electoral Commissioner Faimalomatumua Mathew Lemisio told the Samoa Observer that the number may decrease because they have yet to remove names of the deceased from the roll as well as those who live abroad.
The by-election at Fa'asaleleaga Number 2 Electoral Constituency is the first under new amendments passed early this year which now makes it compulsory for all registered voters to vote.
The commissioner also urged eligible voters to register as it is now also illegal for people not to register.