Colonel William A. Phillips

A nationalist refers to anything associated with or part of nationalism, an idea or movement that promotes the interests of a particular nation.

A Nationalist may refer to an adherent of:

Political organizations

Kuomintang, "The Nationalists" of China, members of a political organization established in 1894 by Sun Yat-sen
Nationalist faction (Spanish Civil War), "The Nationalists" of the Spanish Civil War led by Francisco Franco
Nationalist Clubs, "The Nationalists" belonging to an American political movement advancing the ideas of Edward Bellamy
Nationalist Movement, a political organization based in the U.S. state of Mississippi
Nationalist Party (Iceland), a political party existing from 1934 to 1944
National Party (South Africa), a political party existing from 1915 to 1997, often referred to as Nationalists
Nazi Party, a political party existing in Germany between 1920 and 1945, officially named the National Socialist German Workers' Party