Hispanic Americans and Latino Americans are people in the United States of America who are descendants of the Spanish-speaking and Portuguese-speaking countries of Latin America and Spain. It is the largest population of Latino Americans and Hispanics outside of Latin America. More generally, it includes all persons in the United States who self-identify as Hispanic or Latino, whether of full or partial ancestry. For the 2010 United States Census, people counted as "Hispanic" or "Latino" were those who identified as one of the specific Hispanic or Latino categories listed on the census questionnaire ("Mexican," "Puerto Rican," or "Cuban") as well as those who indicated that they were "other Spanish, Hispanic, or Latino." The national origins classified as Hispanic or Latino by the United States Census Bureau are the following: Spanish, Argentine, Cuban, Colombian, Puerto Rican, Mexican, Dominican, Costa Rican, Guatemalan, Honduran, Nicaraguan, Panamanian, Salvadoran, Bolivian, Chilean, Ecuadorian, Paraguayan, Peruvian, Uruguayan, and Venezuelan. Other U.S. government agencies have slightly different definitions of the term, including Brazilians and other Portuguese-speaking groups. The Census Bureau uses the terms Hispanic and Latino interchangeably. 

"Origin" can be viewed as the ancestry, nationality group, lineage, or country of birth of the person or the person's parents or ancestors before their arrival in the United States. People who identify as Spanish, Hispanic, or Latino may be of any race. As the only specifically designated category of ethnicity in the United States (other than non-Hispanic/Latino), Hispanics form a pan-ethnicity incorporating a diversity of inter-related cultural and linguistic heritages. Most Hispanic Americans are of Mexican, Puerto Rican, Cuban, Salvadoran, Dominican, Guatemalan, or Colombian origin. The predominant origin of regional Hispanic populations varies widely in different locations across the country.
Can someone of any race call themselves Hispanic or Latino?
The national origins classified as Hispanic or Latino by the United States Census Bureau are the following: Spanish, Argentine, Cuban, Colombian, Puerto Rican, Mexican, Dominican, Costa Rican, Guatemalan, Honduran, Nicaraguan, Panamanian, Salvadoran, Bolivian, Chilean, Ecuadorian, Paraguayan, Peruvian, Uruguayan, and Venezuelan