西福尔（Vestfold）挪威东南部一郡，毗邻布斯克吕和泰勒马克。面积2224平方公里,人口239,907。位于奥斯陆峡湾西岸。郡首府滕斯贝格（Tønsberg）。

挪威第一位国王金发哈拉尔(Harald Fairhair)的家乡，听说来自这个地区。那时西福尔包括Lier和Eiker，是一个狭窄王国。西福尔的国王包括:

Kaupang, a town from the Viking Age is believed to be the first town in Norway, although Tønsberg is the oldest town in Norway still existing. By the 10th century the local kings had established themselves as the first dynasty to begin the unification of Norway.

Vestfold [ˈvɛstˈfɔl]  ( listen) is a county in Norway, bordering Buskerud and Telemark. The county administration is in Tønsberg, and the largest city is Sandefjord. With the exception of Oslo county, Vestfold is the smallest county in Norway by area.