Arab Americans (Arabic: عَرَبٌ أَمْرِيكِا or الأمريكيون العرب) are Americans of Arab ancestry. Arab Americans trace ancestry to any of the various waves of immigrants of the countries comprising the Arab World.

According to the Arab American Institute (AAI), countries of origin for Arab Americans include Algeria, Bahrain, Chad, Comoros, Djibouti, Egypt, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania, Morocco, Oman, Qatar, Israel, Palestine, Saudi Arabia, Sudan, Syria, Somalia, Tunisia, United Arab Emirates, Western Sahara, and Yemen.

According to the 2010 U.S. census, there are 1,698,570 Arab Americans in the United States. 290,893 persons defined themselves as simply Arab, and a further 224,241 as Other Arab. Other groups on the 2010 census are listed by nation of origin, and some may or may not be Arabs, or regard themselves as Arabs. The largest subgroup is by far the Lebanese Americans, with 501,907, followed by; Egyptian Americans with 190,078, Syrian Americans with 187,331, Iraqi Americans with 105,981, Moroccan Americans with 101,211, Palestinian Americans with 85,186, and Jordanian Americans with 61,664. Approximately 1/4 of all Arab Americans claimed two ancestries. A number of these ancestries are considered undercounted, given the nature of Ottoman immigration to the US during the 19th and early 20th centuries.

A number of indigenous non-Arab ethnic groups in Western Asia and North Africa that may have lived in regions of Arab countries and are now resident in the United States are not always classified as Arabs but some may claim an Arab identity or a dual Arab/non-Arab identity; they include Assyrians, Arameans, Jews (in particular Mizrahi Jews, some Sephardi Jews), Copts, Kurds, Iraqi Turkmens, Mandeans, Circassians, Shabaki, Armenians, Greeks, Italians, Yazidis, Persians, Kawliya/Romani, Syrian Turkmens, Somalis, Djiboutians, Berbers (especially Arab-Berbers), and Nubians.