Julius Christopher Fritzner (28 December 1828 – 12 February 1882) was a Norwegian restaurateur and hotelier.
He was born in Skjeberg as a son of Niels Dorph Heide Fritzner (1783–1832) and Nicoline Christine Schwartz Bremer (1793–1864).
In 1861 he moved to Christiania and ran a tea room at different locations as well as the cafe in Frimurerlogen.
In 1873 his brother bought a building in the adjacent street Karl Johans gate, and the Grand Hotel and Grand Café was opened in 1874.
The cafe became a central meeting point in the cultural life of Christiania (from 1924: Oslo).