Mayor Bill de Blasio’s job approval rating has tumbled to a new low of 41 percent and more than half of city voters believe he does not deserve re-election in 2017, according to Quinnipiac Poll results released Tuesday.

His approval numbers fell 9 points from his January rating.

The new poll showed more voters — 52 percent — disapprove of the Democrat’s performance as the city’s chief executive.

Separately, 52 percent of voters say he shouldn’t have a second term while 37 percent say otherwise.

De Blasio’s positives still remain higher among black and Hispanic voters than white ones, according to the poll.

In hypothetical face-offs with mayoral opponents running as independents, de Blasio is in a dead heat with City Comptroller Scott Stringer (37 percent to 36 percent) and with Brooklyn Borough President Eric Adams (35 percent to 34 percent), the poll showed. He would be ahead of Bronx Borough President Ruben Diaz Jr. with 37 percent to 32 percent, it found.

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De Blasio has said he is running for re-election. Stringer, Adams and Diaz have not declared their candidacy.

The poll comes as de Blasio is embroiled in several criminal probes into his campaign fundraising practices, alleged pay-to-play schemes and other activities. He has denied wrongdoing.

“All the corruption stuff clearly has hurt him,” Quinnipiac University Poll assistant director Maurice Carroll said of de Blasio’s approval numbers. “He was up there and here he is negative, the worst he has ever been in a Quinnipiac measure.”

Mayoral spokeswoman Karen Hinton in a statement dismissed the poll findings and cited falling crime rates and affordable housing projects as among the administration’s achievements.

“The one thing less reliable than the weather is a poll,” she said. “The mayor will be judged by results, the only real measure of success.”

Quinnipiac University surveyed 1,038 city voters via landline and cell phone between May 18 and Monday. The poll has a margin of error of plus or minus 3 percentage points.