What is regional nationalism?

Regional nationalism involves exaltation of one's particular region, state, city, country (national) division. The definition of nationalism involves love of country "marked by a feeling of superiority over other countries."

Regional nationalism involves these same sentiments involving one's region. The U.S. Civil War, with the North vs. the South provides an example. Sports affiliations (professional or college) peculiar to one's hometown, state or region, above other regions, cities' or states'.