Dr Gillespie has enjoyed a convincing win to retain the seat of Lyne at the 2019 federal election on May 18.

He was among all National Party members to retain their seats including that of newly elected Cowper MP Patrick Conaghan.

Dr Gillespie claimed the seat with an almost four per cent per cent swing for the Nationals taking 65.49 per cent of the projected two candidate preferred vote ahead of Labor candidate Phil Costa with 38.37 per cent of the electorate's support.

"I am really honoured and humbled to have such a positive response and reaction from the people of the Lyne electorate," Dr Gillespie said on Sunday.

"It is a great honour to represent the people of this electorate and I look forward to delivering for them."

Dr Gillespie listed the key priorities for his next term in government as continuing to provide jobs and growing the local economy, delivering on infrastructure investment and essential services.

He spent much of May 18 out talking with constituents about what concerned them most and for the Lyne electorate, with the oldest voters in the nation, threats to investments and income were creating great stress.

"A lot of tax scares a lot of people," Dr Gillespie said.

"We will deliver tax cuts and they value that. We will also be doing a lot of work to bring electricity prices down because what we've heard and listened to is that it adds to the cost of living and adds significantly to business costs."

Dr Gillespie put the generous swing in his favour down to good old hard work - that's what the people have noticed, he said.

He wasn't surprised by the result though saying pre-election polling needs a serious review.

"I was scratching my head when the polls were saying we could lose. There was a real disconnect between what the polls were saying and what we were hearing.

"Polling needs reviewing and it needs to be a more representative sample of our community."

So what's next?

Dr Gillespie said this week will be all about thanking his supporters and campaign staff for their efforts in returning him to the top job.

"There is a lot to do and continue doing whether that's working on delivering on infrastructure and what we've promised down to those community development projects," he said.

Of the 118,865 people enrolled to vote in Lyne, there were 81,545 formal votes and 7671 informal votes cast.

There were nine candidates contesting the seat.

The electorate of Lyne was named after Sir William Lyne who was named Premier of New South Wales 1899-1901.

Dr Gillespie was elected to the seat in 2013.

It was a successful day for the Nationals on the Mid North Coast with Patrick Conaghan, a newcomer to politics, claiming victory over independent Rob Oakeshott in the seat of Cowper.

Barnaby Joyce has retained the seat of New England. The incumbent Nationals MP had attracted more than 27,000 first preferences, or 53 per cent of the vote.

Mr Joyce, who is set for a third term as the local member, thanked his supporters and his volunteers.