Polling was delayed on Tuesday, July 4, because of issues with the electoral roll.
Pre-counting of ballot papers was done on Tuesday and Wednesday before polling can commence.
Provincial election manager, Philip Telape, told Loop PNG that polling materials and officials moved into the districts today to prepare for polling.
WHP consists of four districts: Dei, Mul-Baiyer, Hagen and Tambul-Nebilyer, with 305 wards and 432 polling teams.
Enga Province also faced the same issue and will begin polling also on Friday at the five electorates of Wabag, Kandep, Kompiam-Ambum, Lagaip-Porgera and Wapenamanda.
There are 411 polling teams in Enga and the biggest electorate is Lagaip-Porgera, with 119 polling teams.
Enga and WHP are the two last provinces in the Highlands Region that are yet to poll while Southern Highlands Province and Jiwaka has completed polling and will commence counting on the weekend.
Counting is now underway in Chimbu and Hela Province.