The notice on Sunday announcing "the departure of some staff from the consulate general in Irbil" came in the latest State Department travel warning for Iraq, dated just two days after a previous one.
The travel warning said the evacuation involved "a limited number of staff members" and that they had been relocated "to the consulate general in Basra (southern Iraq) and the Iraq Support Unit in Amman," in Jordan.
Some staff members from the US embassy in Baghdad have also been relocated to Basra and Amman, but that process had started last month.
The United States on Friday began a campaign of air strikes aimed at halting the advance of Sunni militants from the so-called Islamic State, which in recent days had come within striking distance of Irbil, the Kurdish capital.
US President Barack Obama had justified the strikes in part to protect US personnel stationed in Irbil.
