Baalis was king of the Ammonites during the Babylonian captivity and the destruction of Jerusalem. He was the instigator of the murder of Gedaliah, who had been appointed governor over the cities of Judah.
Baalis appears in the account of the plot against Gedaliah. He hired Ishmael to carry out the killing.
His activity belongs to the period associated with Nebuchadnezzar’s destruction of Jerusalem, dated in the supplied material to about 588 B.C.