Turkish police Sunday fired tear gas at LGBTQ activists who defied authorities by marching in an unauthorized Pride parade in Istanbul.

The parade was banned for the fifth year in a row by the governor’s office, but several hundred of people still rallied on a side street close to the popular Istiklal Avenue and Taksim Square area, cheering and waving rainbow flags, organizers said.

Police allowed parade reps to make a short statement to reporters — and then cops in riot gear tried to disperse the crowd by macing them. Police dogs and water-cannon vehicles were also at the scene.

Some of the attendees chanted, “Shoulder to shoulder against fascism!” and, “We will not be quiet!” according to Agence-France Presse.

Up to 100,000 people attended Istanbul Pride in 2014, but police have blocked the marches ever since, with local authorities rejecting all suggested locations by deeming the LGBT community “societally objectionable.”

Amnesty International has urged Turkey to lift the “arbitrary ban” on the festivities.

“It is … a naked attempt to erase the public collective presence of a group which, in the words of the governorate, is deemed to be ‘societally objectionable,’ ” the human rights group said in a statement.

Homosexuality has been legal in Turkey for decades, but gay-rights groups say harassment and abuse is widespread.

With Post wires