Abdullah K. Zilkha (1913–2000) was a Swiss investment banker.
He was a member of the Zilkha Iraqi-Jewish banking family.
In the early 1970s, Zilkha's investment banking firm Ufitec, S.A., was a central player in the saving of the Penn Central from bankruptcy.
At the direction of Lloyd Cutler, the Washington, D.C. attorney, Zilkha met with Donald Prell, an executive with Union Bank Corp., in Zürich in late December 1971, to facilitate gaining consent of all bondholders to a refinancing so the U.S. railroad's assets could be preserved.
They had a son, Daniel A. Zilkha, born October 1, 1942, who became a New York City-based executive and philanthropist.