The association carried out the survey to find out what young voters were thinking in the "post-Trump, post-Brexit era".
Only 41 per cent of intending young voters knew who they were going to vote for. And less than half were confident at least one party represented their interests, the survey found.
Bree said it was concerning that many young voters had not decided to vote or who to vote for.
"In the build-up to the election, the focus tends to go onto polling," he said. "Most younger voters are still undecided and it is important that the political parties and the media do their best to provide quality information to voters so they can make informed decisions about our nation's future."
More young women (78 per cent) intended to vote than young men (72 per cent), while Wellingtonians were most likely to vote and Aucklanders least likely.
Almost all respondents - 94 per cent - said the right to vote was important to New Zealand's democracy.
Online voting, civics education, compulsory voting and better information were among suggestions to improve the election process.