WASHINGTON — Rep. Nita Lowey, the first woman chair of the House Appropriations Committee, won’t seek re-election next year, delivering a big blow to New York’s clout in the House.

“After 31 years in the United States Congress, representing the people of Westchester, Rockland, Queens and the Bronx, I have decided not to seek re-election in 2020,” Lowey, 82, said in a statement.

Lowey made history in 2019 when she became the female leader of the powerful appropriations committee where she hammered out spending packages and struck a bicameral, bipartisan deal to reopen the government in February without President Trump’s border wall funding.

Lowey’s retirement is a blow to New York’s influence on the committee that has the power of the purse. Another longtime member, Rep. Jose Serrano of the Bronx, announced in March he would not seek reelection because he’s living with Parkinson’s disease. The only other New Yorker on Appropriations is Queens Rep. Grace Meng.

Lowey was facing her first primary challenge since entering office from the left from Mondaire Jones, a Harvard Law graduate who served in President Obama’s Justice Department. But the primary challenge wasn’t a factor in her decision, but rather a chance to enjoy retirement with her husband and end her career on the high note of making history, according a Democratic source familiar with her thinking.

“I look forward to more time with my husband Steve and our family, who have strongly supported my career in public service,” Lowey said.

First elected in 1988, Lowey joined the Appropriations committee that had long been dominated by males in 1993. She teamed up with Nancy Pelosi of California and Rosa DeLauro of Connecticut and the three friends were known as “DeLoSis” (pronounced like Pelosi). The trio fought for women’s health funding, including getting women included in clinical trials, DeLauro told Roll Call.

“Chairwoman Lowey has earned the respect of all our colleagues as a leader who is both gracious and tenacious; who seeks always to find common ground where she can and stands her ground where she can’t,” Pelosi said.

Lowey used her influence to appropriate funds for local issues such as the clean-up and protection of Long Island Sound and the Hudson River, homeland security assistance, funding the new Gov. Mario M. Cuomo Bridge and federal assistance for 9/11 and Superstorm Sandy victims.

Among her proudest accomplishes are authoring legislation to make .08 the standard blood alcohol content for drunk driving and requiring food labels to have clear allergy information on packaging, she said.

Lowey, who is Jewish, voted against President Obama’s nuclear deal and has been a longtime booster of US-Israel relations.

“Ms. Lowey’s decision to not seek re-election is a great loss for all of us — especially those of us in the pro-Israel community,” said Aaron Keyak, former head of the National Jewish Democratic Council. “She has been a true champion and one of the strongest to ever hold the gavel for the House Appropriations Committee.”

Lowey plans to finish out her term by passing appropriations bills for the 2020 and 2021 fiscal years and fighting “vigorously for House Democratic priorities.”

“I will continue working as hard as ever – with the same optimism and energy – through the end of this term in Congress,” she said.