A transgender city employee slapped the Parks Department with a discrimination lawsuit after the man — who was born a woman — was forced to use the women’s locker room or be barred from a Staten Island public pool, according to his complaint.

Bryan John Ellicott, who works at the city’s Office of Emergency Management, went to the Lyons Pool in Tompkinsville last July.

The 24-year-old, who started hormone therapy in 2012 and is identified as male on his driver’s license, changed into swim trunks and a black t-shirt in the men’s locker room.

When Ellicott, who still has female physiology including breasts, returned to the changing area to swap out a shirt he was confronted by a Parks employee.

"Hey you need to leave," the employee allegedly told Ellicott.

"Someone complained about someone being in the locker room who doesn't belong here," the staffer said, according to the suit.

Ellicott said he was given a choice—go to the women’s locker room or get out.

He is seeking unspecified money damages.

A spokesman for the city's Law Department said, “We will review the lawsuit when we are served” with legal papers.

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