Arab Americans (Arabic: عَرَبٌ أَمْرِيكِا, romanized: ʻArab Amrīkā or Arabic: العرب الأمريكيون, romanized: al-ʻArab al-Amrīkīyūn) are Americans who trace ancestry to any of the various waves of immigrants from the Arabic-speaking countries. In the United States census, Arabs are racially classified as White Americans which is defined as "A person having origins in any of the original peoples of Europe, the Middle East, or North Africa".

According to the 2010 United States 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 ethnic and ethnoreligious groups in West Asia and North Africa that lived in majority 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, Jews (in particular Mizrahi Jews, some Sephardi Jews), Copts, Kurds, Iraqi Turkmens, Mandeans, Circassians, Shabaki, Armenians, Yazidis, Persians, Kawliya/Romani, Syrian Turkmens, Berbers, and Nubians.

The majority of Arab Americans, around 62%, originate from the region of the Levant, which includes Syria, Lebanon, Israel, Palestine, and Jordan, although overwhelmingly from Lebanon. The remainder are made up of those from Egypt, Morocco, Algeria, Iraq, Libya, the Gulf Cooperation Council, and other Arab nations.

There are nearly 3.5 million Arab Americans in the United States according to The Arab American Institute. Arab Americans live in all 50 states and in Washington, D.C., and 94% reside in the metropolitan areas of major cities. According to the 2010 US census, the city with the largest percentage of Arab Americans is Dearborn, Michigan, a southwestern suburb of Detroit, at nearly 40%. The Detroit metropolitan area is home to the largest concentration of Arab Americans (403,445), followed by the New York City Combined Statistical Area (371,233), Los Angeles (308,295), San Francisco Bay Area (250,000), Chicago (176,208), and the Washington, D.C., area (168,208). This information is reportedly based upon survey findings but is contradicted by information posted on the Arab American Institute website itself, which states that California as a whole only has 272,485, and Michigan as a whole only 191,607. The 2010 American Community Survey information, from the American Factfinder website, gives a figure of about 168,000 for Michigan.

Sorting by American states, according to the 2000 US census, 48% of the Arab American population, 576,000, reside in California, Michigan, New York, Florida, and New Jersey, respectively; these 5 states collectively have 31% of the net US population. Five other states – Illinois, Texas, Ohio, Massachusetts, and Pennsylvania – report Arab American populations of more than 40,000 each. Also, the counties which contained the greatest proportions of Arab Americans were in California, Michigan, New York, Florida, New Jersey, Ohio, Pennsylvania, and Virginia.

The cities with 100,000 or more in population with the highest percentages of Arabs are Sterling Heights, Michigan 3.69%; Jersey City, New Jersey 2.81%; Warren, Michigan 2.51%; Allentown, Pennsylvania 2.45%; Burbank, California 2.39% and nearby Glendale, California 2.07%; Livonia, Michigan 1.94%; Arlington County, Virginia 1.77%; Paterson, New Jersey 1.77%; and Daly City, California 1.69%.

Bayonne, New Jersey, a city of 73,000, reported an Arab American population of 17.0% in the 2020 US census.