Isoaimo reached the absolute majority of 18,011, polling a total of 20,589 votes after exclusion 25.
Rival Paru Aihi of People's National Congress Party polled 15,432 as his final vote count.
Isoaimo will be officially declared by Kairuku-Hiri Returning Officer Tabu Vaira at Bomana CS this afternoon.
This will be Isoaimo's second term in Parliament.
(Loop file pic)