Jan Andries Blokker Sr. (27 May 1927 – 6 July 2010) was a Dutch journalist, columnist, publicist, writer,[1] and amateur historian.

In 1950, Blokker made his debut as a novelist with the novelle Séjour, for which he won the Reina Prinsen Geerligs Award.

At the art section of the news paper, he met important Dutch writers like Henk Hofland and Harry Mulisch.

Blokker was also a screenwriter, who wrote the scripts for films like Fanfare by Bert Haanstra (1958) and Makkers Staakt uw Wild Geraas by Fons Rademakers (1960) and Monsieur Hawarden (1969).

In the 1960s and 1970s, he was seen as the voice of the intellectual left, specialized in satirical pieces about politics, current affairs and whatever was fashionable with the left-wing readers of the newspaper.