A six per cent swing towards the government in the electorate saw Ms Cooke take a victorious 76.4 per cent majority.

Country Labor's Mark Douglass fell to second with 23.6 per cent of the overall vote.

The fourth largest in the state, the Cootamundra electorate extends from Narrandera to Cowra.

Ms Cooke took the top vote from all but two polling booths on Saturday.

A larger percentage of voters placed Mr Douglass as first preference in Gundagai.

Across the electorate, however, Ms Cooke maintained a 60 per cent monopoly on the overall first preference vote.

Issuing a statement on Sunday, Ms Cooke thanked the electorate for their support during the campaign, and over the 18-months since she took office.

"I promise to uphold the honour bestowed upon me by the community and represent the Cootamundra electorate in NSW Parliament to the absolute best of my ability," the statement read.

"There is still so much more work to be done for all of the communities in the Cootamundra electorate and I am looking forward to getting back out on the road and meeting up with as many people as I possibly can."

The state's overall landscape has changed with neighbouring electorates of Barwon, Murray and Orange, falling to the Shooters, Fishers, Farmers candidates.

Meanwhile, in Wagga, independent candidate Dr Joe McGirr reclaimed the seat, after having won last year's by-election.

Dubbo was the hardest fought, with the Nationals member Dugald Saunders only able to claim a slim majority after several recounts.