Frid Ingulstad (born 4 September 1935) is a Norwegian novelist.
Ingulstad the following book series: Kongsdøtrene (14 books), Ildkorset (12 books), Ingebjørg Olavsdatter (45 books) and Sønnavind (44 books).
In 2006 she sold 420,000 books in Norway, making her the biggest selling author in her country.
In 2013, Ingulstad had her 200th book published, A record among living Norwegian authors.