Brooklyn Democratic Party boss Frank Seddio plans to resign this week, The Post has learned.

Seddio, who was elected as chairman in 2012, will announce he’s bowing out at a party committee meeting on Wednesday, sources said. His term would have ended in September.

“I’m announcing I’m stepping down,” Seddio confirmed to The Post in a phone call on Sunday.

“I’ve been the chairman for [eight] years. It’s been fun. It’s been a good run.”

The 74-year-old party leader noted that his wife was also retiring, as a school principal, and that it was time to move on to other ventures. Seddio said he would remain the 59th Assembly District leader.

“I’m retiring as the chairman and semi-retiring from my law practice,” he said. “I hope God gives me a few more years.”

Assemblywoman Rodneyse Bichotte (D—Flatbush), who most recently served as chair of the party’s finance committee, is the leading contender to replace him, according to party sources.

She’s expected to be named interim leader by the 42-member executive board on Thursday.

“I’m personally supporting her. She will be the first woman to become the county leader,” said Seddio, who was having dinner with Bichotte and the party’s law committee chair, Frank Carone, on Sunday evening.

If she wins re-election in the fall, Bichotte would be the first woman of color to lead a Democratic party in New York City. She was the first Haitian-American from New York City to be elected to the State Legislature when she assumed office in 2015 and the second overall after Assemblywoman Michaelle Solas of Nassau County.

June Bunch, an 81-year-old black community activist from Hollis, served as the temporary Queens Democratic Party chair for a couple of months last year after ex-Congressman Joe Crowley resigned.

Seddio’s plans to step down were first reported by the Brooklyn Paper on Sunday.

Additional reporting by Tamar Lapin