Mr Adams said the Police Service of Northern Ireland (PSNI) told him a threat had been made against him and other senior Sinn Féin figures by someone claiming to represent the banned loyalist paramilitary group the Ulster Freedom Fighters (UFF).
The Sinn Féin leader took to Twitter to state: “Just been told by PSNI of death threat against me & SF leadership by someone claiming 2 speak 4 UFF.”
The move comes after Mr Adams was forced to apologise for using offensive language to describe some unionists during a public meeting in the North.
He used the term “bastards” while answering a question at a gathering in Fermanagh, but insisted it was aimed at bigots.
In May, he was told there was a “credible” threat against his life after his release from police custody where he had been questioned about the murder of Belfast mother Jean McConville in 1972 and other alleged links to the IRA.
He blamed opponents of the peace process for the threat which was passed to members of his family while he was detained at Antrim police station for four days.
Mr Adams said he would not let the threat impact on his political life. “This is a worrying development but it will not deter me or Sinn Féin from moving forward with our campaign for a new, independent Ireland of equals,” he said.