Ellis Fjord () is a long narrow fjord between Breidnes Peninsula and Mule Peninsula in the Vestfold Hills. Photographed by the Lars Christensen Expedition (1936–37), and plotted by Norwegian cartographers as a bay and a remnant lake which were called Mulvik (snout bay) and Langevatnet (the long lake) respectively. Analysis by John Roscoe of air photos taken by U.S. Navy Operation Highjump (1946–47) showed these two features to be connected. The feature was renamed Ellis Fjord by Roscoe after Edwin E. Ellis, aerial photographer on U.S. Navy Operation Highjump flights over this area.
This article incorporates public domain material from the United States Geological Survey document "Ellis Fjord" (content from the Geographic Names Information System).