Some of Alberta's NDP members say the party has changed the province for the better and believe it will be an effective Opposition.

On Tuesday, Albertans elected Jason Kenney and his United Conservative Party to a majority government after taking back many of the breakthrough NDP wins in the 2015 election.

Outgoing premier Rachel Notley said she would stay on as NDP leader.

An advisor who helped run the NDP's campaign said Notley and the party changed the shape of Alberta politics after their surprise rise to power four years ago.

"It ended a 44-year dynastic political climate that you have in Alberta," said Sally Hausser.

"Even this election showed — obviously not the result we would have liked to have seen — but it's very much that the NDP is here to stay, which is very much a positive."

NDP leader Rachel Notley and her husband Lou Arab leave after giving a concession speech on election night. (Jason Franson/Canadian Press )

Hausser said the NDP was able to raise more money, bring out more volunteers, place more election signs and grow the party.

"Going forward, you will see the NDP continue to fight for exactly the same things they were fighting beforehand."

Hausser listed economic diversification, climate leadership, reduction in child poverty and a strong education system as some of the improvements by Notley's government.

"One thing that's been clear in the campaign and during her time in government — she's a fighter and that's always a fun thing to have in opposition," said Hausser.

Other NDP members who were re-elected Tuesday said they will also continue to fight for the Alberta they believe in.

"Many Albertans gave us a very strong direction that they want us to fight for things that Rachel ran for in her platform," said Sarah Hoffman, the NDP's former health minister, who held onto her Edmonton seat.

"I have a feeling it will be one of the most effective oppositions we've ever seen in Alberta's history," she said.

Former education minister David Eggen, who has served as a legislature member in Edmonton off and on since 2004, said he's proud of the NDP's record.

"It's difficult during an economic downturn for any government. But we chose to continue to build — build schools, build infrastructure and build the social infrastructure that we need to reflect a modern society here in Alberta," he said.

"I am very, very proud of what we've achieved."

Eggen said the NDP will now hold the government to account.

"The UCP must know that to govern responsibly, they have to represent and reflect what we are and who we are as Albertans in 2019," Eggen told reporters after Notley's concession speech.

"I will hold that expectation to them every day."

Eggen said he continues to support Notley as leader of the party.

"Notley is the best thing that's hit leadership and governance in this province for 100 years, quite frankly," he said. "I've never worked with anyone so competent and with such vision and leadership."