BC Green Party Leader Andrew Weaver has also retained his seat in Oak Bay-Gordon Head.
In 2013 in Saanich North and the Islands the NDP's Gary Holman scored 33.27 per cent of the vote, compared with 32.76 per cent for Liberal Stephen Roberts and 32.07 per cent for the Green's Adam Olsen.
Olsen has 42.91 percent of the vote with 49 of 113 ballot boxes counted.
New Democrat Leader John Horgan voted at an advance poll.
Projections showed Liberal candidates elected in 40 ridings and leading in two, the NDP elected in 38 seats and leading in four and the Greens elected in two and leading in one.
The NDP entered Tuesday's provincial election holding 11 of 14 seats on Vancouver Island.
The NDP has done particularly well in Burnaby, the Tri-Cities, and some of the outer suburbs.
There is now a clear urban-rural divide across the province electoral slate, according to B.C. pollsters. "I'm just working hard to make sure British Columbian's know what I stand for, what I believe in and the choice, the really, really stark choice in this election".More news: Trump may pick Comey's replacement next week
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"To those voters not yet decided, join with us, come together and let's create a better B.C.", he said at a campaign stop in Surrey.
Whichever party they choose to work with would get to form the government, while the other party would become the official opposition.
"It would be irresponsible for me to undermine any negotiating potential I would have prior to people going to vote, to actually say what we would do", said Weaver, the lone Green in the legislature after the last election.
And they have been supported, at least in part, by the NDP and opposed by the BC Liberals. The Greens considered Furstenau a "star" candidate gaining recognition for her role in a battle over contaminated soil at Shawnigan Lake.
Depending on the outcome, British Columbians may be in for a new NDP government that would aim to block the Kinder Morgan pipeline twinning, and potentially unravel BC Liberal megaprojects like the Site C dam and Massey Bridge, while raising taxes on the wealthy and providing new subsidies for child care and to aid renters. The province has Canada's lowest unemployment rate and has led the country in economic growth two years in a row.
But it's likely British Columbia is heading into unfamiliar territory, with a high probability of the first minority government since 1952 when W.A.C. Bennett enlisted the support of the lone Labour MLA to take charge.
"We both want to ban corporate and union donations, we both want action on climate change".
One of Clark's surprise moves during the campaign was to pledge to ban or tax out of viability USA thermal coal exports through B.C. ports in retaliation for US duties on softwood lumber.