King Ottokar's Sceptre is the eighth volume of The Adventures of Tintin, the comics series by Belgian cartoonist Hergé. Commissioned by the conservative Belgian newspaper Le Vingtième Siècle for its children's supplement Le Petit Vingtième, it was serialised weekly from August 1938 to August 1939. Hergé intended the story as a satirical criticism of the expansionist policies of Nazi Germany, in particular the annexation of Austria in March 1938. The story tells of young Belgian reporter Tintin and his dog Snowy, who travel to the fictional Balkan nation of Syldavia, where they combat a plot to overthrow the monarchy of King Muskar XII.

The Adventures of Tintin is a series of 24 comic albums created by Belgian cartoonist Georges Remi, who wrote under the pen name Hergé. The series was one of the most popular European comics of the 20th century. By 2007, a century after Hergé's birth in 1907, Tintin had been published in more than 70 languages with sales of more than 200 million copies, and had been adapted for radio, television, theatre, and film.