Hudiksvall County, or Hudiksvalls län, was a County of Sweden, between 1645 and 1654. Together with Härnösand County it seceded from Norrland County, but acceded to the same constellation under the name Västernorrland County just nine years later. The seat of residence for the Governor was in Hudiksvall.

It included the Provinces of Gestricia, Helsingia and Herdalia. That constellation seceded once again to form Gävleborg County in 1762.

See also: Norrland