The County of Åbo and Björneborg (Åbo och Björneborgs län, Turun ja Porin lääni) was a county of the Swedish Empire from 1634 to 1809.

The county was named after the cities of Åbo (Turku) and Björneborg (Pori). Åbo was not only the provincial capital but centre of government for all of Finland while it was a part of the Kingdom of Sweden. It also included the Åland Islands.

By the Treaty of Fredrikshamn in 1809 Sweden ceded all its territories in Finland, east of the Torne River , to Russia. The county was succeded by the Governorate of Åbo-Björneborg in the Grand Duchy of Finland as part of the Russian Empire.

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 (1806-1809)