Åbo and Björneborg County, Åbo och Björneborgs län or Turun ja Porin lääni, was a county of Sweden from 1634 to 1808, named after the cities of Åbo and Björneborg.

After the Treaty of Fredrikshamn in 1808 it continued to be a County of Finland until a reform in 1997 introduced a new administrative entity, the Provinces of Finland. Åland was part of the county from 1634 until it gained autonomy in the 1920s, within independent Finland.

List of Governors

• Jacob Bure (1698-1706)
• Justus von Palmenberg (1706-1714)
• Johan Stiernstedt (1714-1722)
• Otto Reinhold Uexkull (1722-1746)
• Lars Johan Ehrenmalm (1747-1749)
• Johan Georg Lillienberg (1749-1757)
• Jeremias Wallén (1757-1769)
• Christoffer Johan Rappe (1769-1776)
• Fredrik Ulrik von Rosen (1776-1781)
• Magnus Wilhelm Armfelt (1781-1790)
• Ernst Gustaf von Willebrand (1790-1806)
• Knut von Troil (1806-1816)
  • Otto Herman Lode (acting 1811-1813)
• Carl Erik Mannerheim (1816-1822)
  • Lars Gabriel von Haartman (acting 1820-1822)
• Erik Wallenius (1822-1828)
• Adolf Broberg (1828-1831)
• Lars Gabriel von Haartman (1831-1840)
• Gabriel Anton Cronstedt (1840-1856, acting until 1842)
• Carl Fabian Langenskiöld (1856-1857)
  • Samuel Werner von Troil (acting 1856)
  • Selim Mohamed Ekbom (acting 1857)
  • Johan Axel Cedercreutz (acting 1858-1863)
• Carl Magnus Creutz (1864-1889, acting 1866)
• Gustaf Axel Samuel von Troil (1889-1891)
• Wilhelm Theodor von Kraemer (1891-1903)
• Theodor Hjalmar Lang (1903-1905)
• Knut Gustaf Nikolai Borgenström (1905-1911)
• Eliel Ilmari Wuorinen (1911-1917)
  • Albert Alexander von Hellens (acting 1917)
• Kaarlo Collan (1917-1922)
• Ilmari Helenius (1922-1932)
• Frans Wilho Kyttä (1932-1949)
• Erkki Härmä (1949-1957)
• Esko Kulovaara (1957-1971)
• Sylvi Siltanen (1972-1976)
• Paavo Aitio (1977-1985)
• Pirkko Työläjärvi (1985-1997)

See also: län