Two-term Democratic incumbent Gov. Andrew Cuomo’s lead over Republican rival Marc Molinaro has shrunk considerably but he’s still comfortably ahead entering Tuesday’s election, a new poll released Sunday reveals.

The Siena College survey shows that 49 percent of likely voters support Cuomo compared to 36 percent for Molinaro — 13 point gap.

Last month, it was Cuomo 50 percent to Molinaro’s 28 percent — a 22 point gap.

That means Cuomo’s lead over Molinaro plummeted by nine points despite the power of incumbency and massively outspending his outgunned GOP opponent during the final weeks of the campaign.

Cuomo took heat during the final weeks for participating in only one debate with Molinaro — and agreeing to only after The Post put him on the front page in a chicken suit for four consecutive days.

Molinaro gained support among Republicans and registered independent voters and white suburban and upstate men.

The poll also showed 3 percent of voters backing Libertarian candidate Larry Sharpe and 2 percent apiece supporting Green Party candidate Howie Hawkins and Serve America Movement candidate Stephanie Miner.

Another 7 percent were undecided or didn’t express a preference.

Results in other statewide races point to continued blue rule in New York:

Democratic incumbent Sen. Kirsten Gillibrand led Republican challenger Chele Farley 58 percent to 35 percent.

Democratic incumbent Comptroller Tom DiNapoli is crushing GOP rival Jonathan Trichter 62 percent to 25.

But the race for the open seat for attorney general is much closer, with Democrat Leticia James ahead of Republican Keith Wofford 49 percent to 37 percent.

Cuomo’s popularity has waned during the home stretch of the campaign.

For the first time during his eight year tenure, more voters viewed him unfavorably [49%] than favorably [45%]. Last month, his favorability rating was slightly positive — 50% to 46%.

Last month, independents favored Cuomo by ten points but now back Molinaro by 7 points.

Also, 47 percent of voters said New York is heading in the wrong direction compared to 40 percent of respondents who said it’s on the right track.

“Days before voters go to the polls, Molinaro has narrowed Cuomo’s lead. Republicans are ‘coming home’ to support their nominee much stronger than last month,” said Siena pollster Steve Greenberg.

Cuomo’s cushion comes from his large Democratic base in New York City, where he’s supported by 77 percent of voters compared to just 14 percent for Molinaro. He also leads by a 2-1 margin among women, 56 percent to 28.

The downstate suburbs are split — 44 percent for Cuomo and 41 percent for Molinaro.

Molinaro bested Cuomo by ten points among upstate voters, 46 percent to 36 percent and among men, 45 percent to 41 percent.

“Voters are poised to give Cuomo a third-term. The question appears to be by what margin?,” Siena’s Greenberg said.

“Will Democrats and New York City voters turnout in bigger numbers than they have in recent midterms? If so, Cuomo has the chance to run up the score. If not, or if Republican enthusiasm matches increased Democratic enthusiasm – particularly in upstate and the suburbs where there are hotly contested House and State Senate races – then the final results will likely look similar to four years ago.”

In 2014, Cuomo defeated GOP challenger Rob Astorino by 14 points to win a second term.

The survey interviewed 641 likely voters and has a 3.9 point margin of error.