Omar Mateen’s wife is a target of the FBI probe into his terror rampage, two congressmen said Wednesday — with one predicting that Noor Salman “could be charged” in the deadly attack on a gay nightclub in Florida.

“I know that she is the focus of the investigation. I know that they are considering charges against her,” Rep. Peter King (R-LI), a member of the House Committee on Homeland Security, told The Post. “She could be charged with being a co-conspirator to murdering 49 people.”

Sen. Angus King (I-Maine), no relation, a member of the Senate Intelligence Committee, said that his committee had been briefed on the Florida massacre and that it appeared Salman had “some knowledge” of what her husband was planning.

“We don’t know whether she was involved and knew about the purchase of the guns, which took place, by the way, only about a week before the attack,” he told CNN. “But she definitely is, I guess you would say, a person of interest right now and appears to be cooperating and can provide us with some important information on who this guy is, what his motivations were and what his plans were.”

Meanwhile, a federal grand jury reportedly was investigating the early Sunday bloodbath at the Pulse nightclub, in which Mateen was killed by cops.

Law-enforcement sources in West Palm Beach, Fla., said security was beefed up at the federal courthouse there Wednesday over the possibility Salman might be hauled in to face charges — and would be again Thursday.

Federal sources have told The Post that Salman told investigators she had gone with her husband to case out Disney World and the Pulse nightclub.

Authorities also have video of Mateen and Salman buying bullets ahead of his rampage, CBS News reported, although it was unclear how much ammo they bought or when they purchased it.

Salman, 30, who has a 3-year-old son with Mateen, has been largely in hiding since Sunday.

A family friend who brought two bags of groceries to the home of Salman’s mother in Rodeo, Calif., said, “They’re stressed. They’re frightened. Oh, my heart goes out to her. So I’m taking food,” Lisa Vizcarra said.

A neighbor described Salman as a sweet but dim-witted woman who grew up a sheltered child and was in an arranged marriage and divorced before meeting the future mass murderer online.

“She definitely is, I guess you would say, a person of interest right now.” - Sen. Angus King

Jasbinder Chalal told the Chicago Tribune that Salman, one of four sisters, was “very nice” and “not the smartest, but she was beautiful.

“You know, some kids after high school, they open up the box and the world is theirs. She was inside the box, just pack it up and get married,” Chalal said.

After graduating high school in 2004, Salman’s Palestinian parents, who became naturalized in 1984, arranged a marriage for her, the Tribune reported.

She briefly lived in Chicago with her first husband until their marriage fell apart, the paper said. “They had cultural differences since she grew up here and was American,” Chalal said.

Mateen also had a first marriage that lasted only four months, to Sitora Yusufiy, who accused him of being abusive and having “gay tendencies.”

Mateen and Salman met on Facebook. They were married Sept. 29, 2011, in a Muslim ceremony in Hercules, Calif., according to the Tribune.

Chalal quoted Salman’s mom as saying Mateen didn’t allow her to drive after she joined him in Florida.

Chalal also said Mateen kept his wife from visiting her family and even tried to prevent her from traveling to comfort her dying father.

Additional reporting by Shawn Cohen in Port St. Lucie, Fla.