Fullerton is a city in Nance County, Nebraska, United States. The population was 1,190 as of the 2010 Census. The community name is derived from cattleman Randolph Fuller.
Fullerton is the county seat of Nance County.
A location by Fullerton called "Buffalo Leap" was thought to be used by aboriginals for driving Buffalo to their deaths as a hunting method. It is also known as "Lover's Leap". Currently it is a part of the Broken Arrow Wilderness Camp located just north of Fullerton.