Nearly a third of New York’s state Senate Republicans are calling it quits ahead of the 2020 election, ceding ground to Democrats keen on pushing the Empire State further to the left.

Seven GOP senators out of 23 members are jumping ship, with the latest retirement announcement coming Wednesday from upstate Sen. Joe Robach (R-Rochester).

He follows departing Sens. Michael Razenhofer (R-Buffalo), Betty Little (R-Queensbury), George Amedore (R-Kingston) and freshman Bob Antonacci (R-Syracuse), who will vacate his seat for a Syracuse-area judgeship.

Sens. Chris Jacobs (R-Buffalo) and Rob Ortt (R-Lockport), who are running for Congress, are also possibly on their way out.

“When you go from the majority and having a central role in governing, to the minority, it’s very discouraging,” former GOP US Sen. Al D’Amato told The Post.

Republicans lost eight seats during the 2018 election cycle.

“They see they have no voice. They can’t be heard. It’s a crying shame. It’s not like they can overcome this in the next election cycle,” he said, adding that “things might have to get a lot worse,” with voters getting sick of Democrats overreaching with far-left policies, for the GOP to make a comeback.

Senate Democrats also have a fundraising advantage, with $3 million in their campaign account—compared to the Senate GOP, at roughly $322,000 according to filings.

“I can’t blame Senate Republicans for running for the exit,” said Senate Democratic campaign committee chairman Sen. Michael Gianaris (D-Queens). “It’s almost a third of the members they started with, and I’m confident we have not heard the last of the departures.”

If Democrats win at least two more seats, they would hold a super majority in the house, eliminating Gov. Andrew Cuomo’s ability to leverage his veto power by aligning with the minority house.

The Democrats also face the prospect of total control over redistricting, as historically the GOP played a powerful role in the drawing of Senate seats.

Senate Majority Leader Andrea Stewart-Cousins (D-Yonkers) told reporters earlier this week she expects to add at least three more Democrats to her conference’s current 40 seats.

But GOP Minority Leader John Flanagan (R-Suffolk) told reporters in Albany Wednesday that policies like bail reform, giving driver’s licenses to illegal immigrants and raising taxes indicate the beginning of the end, if voters don’t start voting red.

“What the Democrats foisted upon the taxpayers this year is gonna come back and bite them,” he raged.

“They have to run on this record, they have to defend a lot of things that we think are indefensible.”

SUNY Albany political science professor Bruce Gyory predicts that whether the GOP’s “trickle of retirements” will turn into a “torrent of retirements” depends on voters being okay with Democrats’ left-leaning policies over the “Trump brand.”

“Have the Democrats moved so far to the left that they can’t win upstate? This will also make it hard for holding onto gains in the suburbs,” he told The Post.

“Or has the Trump brand triggered a long-term decline for Republicans, which will help Democrats pick off suburban members,” noting that several GOP-held seats on Long Island could be in trouble.