Argentines, Argentinians or Argentineans are people from Argentina. This connection may be residential, legal, historical, or cultural. For most Argentines, several (or all) of these connections exist and are collectively the source of their being Argentine.

Argentina is a multiethnic society, home to people of various ethnic, racial, religious, denomination, and national origins, with the majority of the population made up of Old World immigrants and their descendants. As a result, Argentines do not equate their nationality with ethnicity, but with citizenship and allegiance to Argentina. Aside from the indigenous population, nearly all Argentines or their ancestors immigrated within the past five centuries. Among countries in the world that have received the most immigrants in modern history, Argentina, with 6.6 million, ranks second to the United States (27 million), and ahead of other immigrant destinations such as Canada, Brazil and Australia.

Argentina is a multiethnic society, which means that it is home to people of many different ethnic, racial, religious, and denominational backgrounds. Argentina is a melting pot of different peoples.

In the mid-19th century a large wave of immigration started to arrive in Argentina due to new Constitutional policies that encouraged immigration, and issues in the countries the immigrants came from, such as wars, poverty, hunger, and famines. The main immigration sources were from Europe, the countries from the Near and the Middle East, Russia, and Japan. Eventually, Argentina became the country with the second-largest number of immigrants in the period, with 6.6 million, second only to the United States with 27 million.

Therefore, most Argentines are of full or partial European descent (with a significant indigenous component, and a less prominent black component), and are either descendants of colonial-era settlers and/or of the 19th and 20th century immigrants from Europe.

The most common ethnic groups are Europeans (mostly Spanish and Italian descent) and/or Mestizos (mixed European and Native American ancestry). According to Argentine government websites, it is estimated that more than 20 million Argentines, more than 46% of the total population, have Italian ancestry, wholly or in part. Argentines descend mostly from Spaniards, Italians, Native Americans and to a lesser extent from French, Germans, East Asians, and others.

Immigration of recent decades includes mainly Paraguayans, Bolivians, Peruvians, and Brazilians, among other Latin Americans, Eastern Europeans, Africans, Arabs, and Asians.

Large comprehensive studies across Argentina's many regions in order to characterize the genetic admixture have been lacking. Small sample size studies give the following composition.