A record number of Oahu residents have cast their vote for the 2015 Neighborhood Board election, according to the Honolulu Neighborhood Commission Office.

With a day still left before the ballot closes, nearly 18,500 people have already voted in the all-online election, surpassing the previous record set during the last election in 2013 by nearly 20 percent.

This year, 598 candidates are vying for 437 seats in the biennial, all-online election, which received an innovation award from Harvard University’s John F. Kennedy School of Government for cutting costs by switching to a digital format.

Any Oahu residents who were registered to vote in the 2014 elections or newly signed up with the Neighborhood Commission can still cast their votes until 11:59 p.m. on Friday.

Oahu’s Neighborhood Boards serve as advisory councils that help decide what happens in their community in terms of development, business and neighborhood laws at all levels of government.