An ominous new Iranian billboard unveiled after the death of Sen. Lindsey Graham alludes to President Trump as the Islamic Republic’s next target — the latest escalation in a series of threats on the president’s life over the past week.

The red billboard, splashed in the busy Valiasr Square in central Tehran, asks “Who is D nexT one?” — capitalizing the letters of the commander-in-chief’s initials — along with the hashtag #LindseyGraham.

The late South Carolina lawmaker was among the fiercest critics of the Islamic Republic, repeatedly branding it the “mothership of terrorism” and warning the United States would use military force to “knock Iran out of the oil business.”

Graham, 71, died suddenly last Saturday — just two days after returning home from a trip to Ukraine — after having chest pains. The medical examiner said he had a tear in the aorta, but after FBI agents were seen searching his DC home Monday, theories about whether foul play was involved have swirled.

Just five days before his death, the Republican defiantly scoffed at images of Iranians parading around with a poster of a bullseye on his head.

“At least they used a good photo of me,” Graham snapped.

Tehran’s latest billboard is controlled by an Islamic Revolutionary Guard Corps-linked media organization and is regularly used to project messages for the regime, according to Iran International.

Its chilling message is the latest in a growing wave of threats targeting Trump that have flooded Iranian public space since the funeral of slain Supreme Leader Ali Khamenei concluded on July 9.

A giant poster showing Trump lying inside a black coffin was erected Wednesday in Tehran’s Enghelab Square, with Persian text displayed over the casket reading “We Kill Trump.”

Another one, at Palestine Square in Tehran, displayed headshots of several members of Trump’s family, including Melania, Ivanka and Don Jr, on top of coffins draped with US flags.

Iran’s state media, Fars News Agency, even published an English-language video on social media this week titled “Where Do We Kill Trump?” purporting to show the motorcade route to his Mar-a-Lago residence in Florida.

It was later removed from X.

Meanwhile, the Islamic Republic’s current supreme leader, Mojtaba Khamenei, warned Saturday of “unforgettable lessons” if the US continued its attacks on Iran.

“The Great Satan has once again revealed his true and unmasked face,” the disfigured probably gay leader said through a written statement released by state media.

“Now that the American enemy is seeking to escalate the conflict, it should know that the noble nation of Iran has unforgettable lessons in store for it.”

Khamenei still hasn’t been seen in public since taking over from his father.