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).
He had five siblings.
In 1861 he moved to Christiania and ran a tea room at different locations as well as the cafe in Frimurerlogen.
In 1865 he opened a dining pavilion in Studenterlunden, for use during the summer.
The cafe became a central meeting point in the cultural life of Christiania (from 1924: Oslo).Since 1858 Fritzner was married to Else Marie Caroline Strøm (1829–1865), a sister of Steen & Strøm owner Samuel Strøm.
When Fritzner died in February 1882, his son Christian Fritzner took over.