The Nationals candidate, who won the seat at the 2017 byelection, is an overwhelming $1.01 favourite with several online bookmakers to win a four-year term.

Labor candidate Mark Douglass is on the second line of betting at $9, needing to overcome a 10.5 per cent margin in a seat that has been a conservative stronghold since 1988.

Other candidates are Jeffrey Passlow (Greens), Jim Saleam (Independent) Joseph Costello (Sustainable Australia) and Matthew Stadtmiller (Shooters, Fishers and Farmers).

CSU political scientist Professor Dominic O'Sullivan said a Labor turnaround seemed unlikely, but "a lot can change in a couple of days, as we've seen with Michael Daley's stumbles in the past week".

"The massacres in Christchurch have had an impact, and could perhaps deter some Nationals voters from casting a protest vote with the Shooters.

"It's interesting how international factors can have an influence, but I don't think it's enough to turn the election.

"On the other hand, knocking down the stadium within a few days of the election is a statement of arrogance and that's one of the criticisms made of the government."

Since early voting started on March 11 an average of nearly 300 people a day have voted at Cootamundra Library. Early polling ends at 6pm. Tomorrow, 48 voting centres will be open across the Cootamundra electorate. In and around Cootamundra, centres will be open at Cootamundra Public School (Thompson Street), Cootamundra High School (Poole Street), Jugiong Public School (Flyde Street), Murrumburrah Public School (Ward Street), Stockinbingal Public School (Britannia Street), Wallendbeen Memorial Hall (King Street), and Wombat Soldiers Memorial Hall (Rose Street).