The Diocese of Oulu (Finnish: Oulun hiippakunta, Swedish: Uleåborgs stift) is a diocese within the Evangelical Lutheran Church of Finland. The diocese was first founded in the town of Kuopio in 1851, but the episcopal see was moved to Oulu in 1900.

Bishops of Kuopio

• 1851–1884: Robert Frosterus
• 1885–1897: Gustaf Johansson
• 1897–1899: Otto Immanuel Colliander

Bishops of Oulu

• 1900–1936: Juho Koskimies
• 1936–1943: Juho Mannermaa
• 1943c: Yrjö Wallinmaa
• 1943–1954: Väinö Malmivaara
• 1954–1963: Olavi Heliövaara
• 1963–1965: Leonard Pietari Tapaninen
• 1965–1979: Kaarlo Johannes Leinonen
• 1979–2000: Olavi Rimpiläinen
• 2001–2018: Samuel Salmi
• 2018–present: Jukka Keskitalo

• Evangelical Lutheran Church of Finland

• Media related to Diocese of Oulu at Wikimedia Commons
• Diocese of Oulu (in Finnish)