About 200 anti-police protesters gathered for more than 12 hours in City Hall Park Monday to demand the “defunding” of the NYPD, but didn’t fulfill their vow to “occupy” the park overnight.

Millions March NYC, which shares some goals with Black Lives Matter, demanded that Mayor de Blasio fire Police Commissioner Bill Bratton and deliver reparations to victims of police brutality.

The group, which is also seeking the dismantling of the NYPD — with its budget diverted to needy communities — started gathering at 9 a.m and held orientation sessions.

Protesters held up signs bearing such messages as, “We see police get away with murder.”

“We’re not interested in having any closed-door discussions with politicians. We invite them to come to the park and speak to the community,” said one member, Nabil Hassein.

The group tweeted out to its nearly 13,000 followers: “Yes we are anti-police violence. We are also anti-police.”

While the protesters had promised to stay in the park until their demands were met, those who stayed all day avoided a confrontation with cops by leaving when it closed at midnight, moving to nearby West Plaza, which is open 24 hours.

They promised to return to City Hall Park when it reopened in the morning.