Thisted County (Danish: Thisted Amt) is a former province in Denmark, located on the north-westernmost part of the country It encompassed the westernmost part of the island of Vendsyssel-Thy. It was dissolved in 1970 when the bulk of it was merged into Viborg County while other regions joined the counties of Ringkjøbing and North Jutland.
Thisted County featured the market towns (købstæder) of Nykøbing Mors and Thisted.