Ulo or Ülo may refer to:

• Saint Ulo, a Welsh saint
• Ulu, Inuit knife type
• Clofedanol, from trade name Ulo
• Ülo, Estonian masculine given name

• Sergei Ivanovich Taneev
• Sergei Ivanov (painter)
• Sergei Ivlev
• Sergeij Karev
• Sergeij Pogreban
• Sergeij Sychyov
• Sergei Kabanov
• Sergei Kamaritskikh
• Sergei Kamenev
• Sergei Kamensky
• Sergei Kapitza
• Sergei Kaputin
• Sergei Karaganov
• Sergei Karev
• Sergei Karimov
• Sergei Karjakin
• Sergei Karpenko
• Sergei Khabarov
• Sergei Khachatryan
• Sergei Khaletski
• Sergei Khaletskiy
• Sergei Khaletsky
• Sergei Kharlamov
• Sergei Kharlov
• Sergei Khizhnichenko