乌戈(ukko)，芬兰民族史诗卡勒瓦拉中的雷神，以及天空之神。卡勒瓦拉中的许多英雄都曾向它祈祷。如勒明盖宁在抓希西的鹿时向它祈祷。

Ukko, or Äijä or Äijö (Finnish: male grandparent, grandfather, old man), parallel in Estonian mythology to Uku, is the god of the sky, weather, harvest and thunder in Finnish mythology. The Finnish word for thunder, Ukkonen, is the diminutive form of the name Ukko. Some researchers believe that Ilmarinen, an other Finnic sky god, is the origin of Ukko, while some others believe that Ukko's original name was Baltic Perkele. Ukko is held the most significant god of Finnish mythology, although it is disputed by scholars whether this is accountable to later Christian influence.