Throughout the state, school leaders, police and public officials are having to do something they never thought would be part of their jobs — refute claims of killer clowns in their midst.

Fairfield University, Quinnipiac University, and New Haven public schools are among those plagued with rumors, mostly spread by social media, of nefarious clowns on their premises.

Officials have quickly dismissed the rumors, some with a measure of amusement.

“I think Stephen King is behind this,” quipped Sgt. Robert Didato, of the Fairfield University Department of Public Safety, referring to the vaunted horror writer whose novel “It” centers on a creepy clown.

Some clown rumors, however, have been decidedly unfunny.

Ansonia plans to have police in city schools Wednesday after clown-related social media posts threatened violence in the district.

“The complaints are being thoroughly investigated, and while we do not believe the threats to be credible, there will be an increased police presence at all Ansonia schools (Wednesday),” police said in a release from Lt. Andrew Cota.

The police press release included a social media post from “ansonia_clown” saying there would be “a whole gang of clowns” arriving Wednesday morning to do harm at one Ansonia school.

Indeed, killer clown hysteria is sweeping the nation, as there have been sightings of the creepy Bozos in multiple states, including New Jersey, Pennsylvania and South Carolina. This week, it seemed to hit Connecticut full force.

Didato said Fairfield U. began receiving calls Monday night from parents concerned about clown rumors.

“We reached out to other universities, and were able to substantiate that no crimes were committed by any clowns,” he said.

The department posted on its Facebook page that there were no clowns on campus. Not long after that post, Didato said, two students with clown masks reportedly began walking around the campus. “They thought it would be funny,” Didato said.

The class clowns were found and the masks were confiscated.

Quinnipiac University also grappled with clown rumors. Spokesman John Morgan said that on Monday evening, circulated of a clown-inspired lockdown at Quinnipiac.

“There was never any lockdown, and no one from public safety ever saw any clowns,” Morgan said.

Others dealing with the clown clamor included New Haven Public Schools, where officials became aware clown posts on Monday morning.

Stamford police are investigating a “scary clown threat” posted on social media this week, Superintendent of Schools Earl Kim told parents.

“In the meantime, we remain alert to any suspicious behavior and are reporting it to authorities,” Kim said in the robocall. “I ask that you and your family members do the same. Please report any threatening messages to the police and do not post them or forward them to others.”

The superintendent also asked families not to buy clown costumes.

Municipal leaders aren’t immune to the weirdness. Danbury Mayor Mark Boughton kicked off his Tuesday on social media by tweeting “Mornin' peeps. No evil Clowns in #Danbury . Have a great day! #schoolson .”

These aren’t the first “evil clown” sightings, said Lauren Sardi, associate professor of sociology at Quinnipiac. There were similar rumors in the 1980s, mostly around Boston area.

“It was more localized then, because there was no social media,” she said.