On Sunday, Miss Staten Island is taking a walk — and a stand.

Madison L’Insalata — who exclusively revealed to The Post she is bisexual — plans to deck herself out in rainbow gear when she marches in the Staten Island St. Patrick’s Parade.

Organizers have again banned the Pride Center of Staten Island from marching and L’Inslata wants to show her support for the LGBTQ community.

“There’s no rule against me wearing a rainbow,” said L’Insalata, 23, who has never before publicly discussed her sexual orientation. “I want people to see the colors and ask questions.”

She is part of a widening beauty-queen rebellion against parade bigots in the borough.

Miss Staten Island’s Outstanding Teen, Angelica Mroczek, and Miss Richmond County, Gabrielle Ryan, are boycotting the parade outright because of the gay ban.

“Accepting this title means standing up for what is right and challenging what is wrong, and not just using it as an opportunity to take photos in a pretty crown,” said Ryan, a 17-year-old junior at Port Richmond High School. The issue hits close to home — her mother, Larissa Ryan, is gay and of Irish descent.

The Staten Island march is the only one of the five boroughs’ St. Patrick’s parades to still not allow LGBTQ groups to march under their own banners.

Larry Cummings, a representative for the parade’s organizing committee, did not respond to The Post’s requests for comment. But he told the Staten Island Advance last week: “Here’s the deal, it’s a non-sexual identification parade and that’s that. No, they are not marching. Don’t try to keep asking a million friggin’ questions, OK?”

The beauty queens are bravely going against their own pageant requirements, which obligate title-holders to march.

“You can’t force the girls to do it. There’s a lot of support in our community for their decision,” said Jim Smith, executive director of the Miss Staten Island Scholarship pageants.

“I was looking forward to seeing friends and family and feeling the love,” said Mroczek, who is 16 and a junior at Curtis High School. “But the message is more important than the parade.”

The young women join a growing list of luminaries walking away from the parade, including SI Borough President Jimmy Oddo, Mayor Bill de Blasio and Rep. Max Rose.

Carol Bullock, executive director of the Pride Center of Staten Island, is encouraged by the queens’ conviction. “The whole thing with exclusion is the message it sends to our youth — that it’s OK to discriminate,” she said. “Now, our teens are saying it’s not OK.”

There are four titles under the banner of the Miss Staten Island Scholarship Pageant, which is a preliminary contest for Miss America.

Miss Richmond County’s Outstanding Teen, Victoria Montouri, 17, told The Post she’s marching. “I hope to inspire the young girls who look forward to seeing the Misses in the parade just as I was inspired when I was younger,” she said.

Nicole Doz, a former Miss Staten Island 2018, praised the current title holders’ courage.

“I’m not only proud, but in awe of [their] decisions to step away from the parade,” she told The Post. “It’s a huge honor and exciting experience for a first-time pageant winner to ride in a parade, so for them to make this decision really shows passion for what’s right.”

But Mroczek says she’s no hero.

“I’ve been praised for my courage, although I don’t see my [decision] as courageous at all because the issue to me is ridiculous,” she said. “It’s painfully clear the exclusion is wrong. It doesn’t take courage to side with the obvious.”