The NSW Government will push ahead with forced council amalgamations in the city, but will walk away from regional council mergers that are currently in court.

The Government will abandon any further mergers in regional areas that remain pending.

"Had we had our time over, we would have naturally dealt with councils in Sydney very differently to councils outside of Sydney, that is a decision that we took at the time to deal with the one-size-fits-all model throughout NSW," Premier Gladys Berejiklian said.

"We appreciate for some communities that the process has not been easy.

"We also appreciate that there will continue to be angst in some communities, but what we're doing today is drawing a line in the sand and providing certainty for the future."

But it will move ahead with the remaining five mergers in metropolitan Sydney, unless they are successful in their court battles.

"All merged councils throughout NSW will stay merged," the Premier said.

"The overwhelming feedback we have had from communities, both in Sydney and outside of Sydney, is, even though they were cynical about the process initially — they all feel they want to continue the process of those merged entities."

The council areas that are fighting amalgamation are marked in orange. ( Supplied: NSW Government )

The Government plans to keep all 20 existing mergers in place and hold elections for the Sydney mergers that have yet to occur as soon as possible.

All remaining councils are expected to be completed by October 2017.

The Premier has been under intense pressure over the issue since she took the top job, with the Nationals arguing for the Government to put an end to mergers in regional areas while many in her Liberal partyroom urged her to stay the course.

The Nationals suffered a massive voter backlash over the issue in the Orange by-election.

The State Government will now be bracing for the impact of the Premier's compromise position when voters go to the polls in the North Shore by-election — the seat vacated by former health minister Jillian Skinner —where mergers are also a controversial issue.