Nation's Giant Hamburgers, or simply Nation's, is a privately-held El Cerrito, California-based fast food diner chain.

The chain, founded in 1952, largely operates in the San Francisco Bay Area. The majority (87.5%) of locations are focused in the suburban Greater East Bay; consisting of Alameda, Contra Costa, and Solano counties.

Russ Harvey bought a six-stool hot dog stand on San Pablo's 23rd Street in 1952 with money he obtained through the sale of his 1948 Buick. He subsequently added hamburgers to the menu of the hot dog restaurant with a focus on large portions. This gastronomic decision proved successful with the clientele. The restaurant's name was changed to Harvey's Giant Hamburgers.

In 1961 local teenager Dale Power was hired as a janitor and continued his employment from high school to bachelor's and master's degrees at the nearby University of California, Berkeley. In 1970 he purchased his first restaurant in the Jack London Square District in neighboring Oakland.

He christened it Nation's; the name was decided upon under the belief that they sold the best hamburgers in the nation. At this point Russ Harvey changed the name of his restaurant to Nation's as the two men became partners under a unified brand.

A nation may refer to a community of people who share a common language, culture, ethnicity, descent, or history. In this definition, a nation has no physical borders. However, it can also refer to people who share a common territory and government (for example the inhabitants of a sovereign state) irrespective of their ethnic make-up. In international relations, nation can refer to a country or sovereign state. The word nation can more specifically refer to people of North American Indians, such as the Cherokee Nation that prefer this term over the contested term tribe.

According to Joseph Stalin writing in 1913 in Marxism and the National Question: "a nation is not a racial or tribal, but a historically constituted community of people;" "a nation is not a casual or ephemeral conglomeration, but a stable community of people;" "a common language is one of the characteristic features of a nation;" "a nation is formed only as a result of lengthy and systematic intercourse, as a result of people living together generation after generation;" "a common territory is one of the characteristic features of a nation;" "a common economic life, economic cohesion, is one of the characteristic features of a nation;" "a common psychological make-up, which manifests itself in a common culture, is one of the characteristic features of a nation;" "A nation is a historically constituted, stable community of people, formed on the basis of a common language, territory, economic life, and psychological make-up manifested in a common culture." According to Stalin, this would exclude Jews as they have no common territory.