Ibaraki or Ibaragi (Japanese: 茨木) is a Japanese surname. Notable people with the surname include:
Mitsuba Ibaraki (born 1988), Japanese footballer
Noriko Ibaragi (Japanese: 茨木 のり子, 1926–2006), Japanese writer
Stephen Ibaraki, Canadian information technology professional
Toshihide Ibaraki (Japanese: 茨木 俊秀, born 1940), Japanese computer scientist
Fictional characters
Kasen Ibaraki, a character in Wild and Horned Hermit from the video game franchise Touhou Project
Takeru Ibaraki, a protagonist in the manga Wichblade Takeru