Nemo is an unincorporated community in eastern Somervell County, Texas, United States. It is located at the intersection ofFarm to Market Roads 199 and 200 and had a population of 56 in 1990. The community is part of the Granbury micropolitan area.
Settlement of the area began in the mid-19th century. Originally called Johnson Station after local settler Jimmie Johnson, residents attempted to receive a post office designation under the same name. The postal authorities, however, suggested a shorter name be used. When the residents met to choose a name, one man argued for the name Nemo, which was Latin for "no one." He also said that if Johnson's name was not good enough, "then no one's was." In 1893, a post office branch under the name Nemo was established.