Gothenburg and Bohus County, or Göteborgs och Bohus län, was a County of Sweden until December 31, 1998 when it was merged with the counties of Skaraborg and Älvsborg to form the county of Västra Götaland. The county was named after the City of Gothenburg, and the historical Province of Bohus (Bohus Castle). Gothenburg was the seat of residence for the Governor, and represented the westernmost part of the province of Westrogothia.