The concepts of nationalism and cultural pluralism are terms that have been regarded as ambiguous. There are, however, numerous principles and universally acceptable views, domains of logic, and thought processes that help to define nationalism and cultural pluralism. It is imperative to note that a nation’s social life and dogma are largely influenced by society. The degree of social sophistication in any given society is an outlook of a society’s developmental process. To this end and for this research article, the author will seek to establish a concrete appraisal on the concept’s appraisal on the concepts of nationalism and cultural pluralism with the United States of America as a springboard for analysis. This article will also establish the peculiarities and dynamism of America in its diverse nature concerning culture, polity, history, race, and social life; all of which will serve as determinant variables in the definition and development of nationalism and culture in the United States of America.