The 35-year-old socialite has parted ways from Swiss businessman Thomas Gross, reported Us magazine.
Hilton first met the handsome businessman at the Cannes Film Festival last May, and the two immediately hit it off.
The hotel heiress was so smitten with Gross that she referred to him as her "soulmate" in a July 2015 Instagram post, and gushed in a subsequent interview that he was different from the guys she's previously dated.
Hilton previously dated "Hills" star Doug Reinhardt from 2007 to 2009, former Backstreet Boy Nick Carter and Greek billionaire heir Stavros Niarchos.