Crime plummeted along East 14th Street — and all it took was a stabbing.

Since an apparent lunatic stabbed three people on East 14th Street near Avenue A in June, killing a 38-year-old man and leaving two others seriously wounded, felony crimes on the block are down more than 57 percent, according to data provided by Mayor Adams’ office.

In the 28-day period ending Oct. 13, there were six incidents, compared with 14 incidents for the same time period in 2023, the data show.

Overall, so far in 2024, crime, which includes murder, burglary and criminal assault, is down 12.5% ​​compared to the same time frame in 2023.

911 calls about the problem area dropped nearly 34 percent in the 28-day period compared to the same period in 2023, while calls to 311 dropped about 44 percent, the mayor’s office said.

“The undeniable progress on 14th Street demonstrates the proven success of our community-led, multi-agency approach to quality of life and public safety issues,” Adams said.

After the stabbing, the city launched a multi-agency operation in August, installing daily NYPD bollards on East 14th Street, increasing trash collection and increasing homeless awareness.