Arab identity (Arabic: الهوية العربية) is the objective or subjective state of perceiving oneself as an Arab and as relating to being Arab. Like other cultural identities, it relies on a common culture, a traditional lineage, the common land in history, shared experiences including underlying conflicts and confrontations. These commonalities are regional and in historical contexts, tribal. Arab identity is defined independently of religious identity, and pre-dates the spread of Islam and before spread of Judaism and Christianity, with historically attested Arab Muslim tribes and Arab Christian tribes and Arab Jewish tribes. Arabs are a diverse group in terms of religious affiliations and practices. Most Arabs are Muslim, with a minority adhering to other faiths, largely Christianity, but also Druze and Baháʼí.

Arab identity can also be seen through a lens of national, regional or local identity. Throughout Arab history, there have been three major national trends in the Arab world. Pan-Arabism rejects the individual Arab states' existing sovereignty as artificial creations and calls for full Arab unity.

Paternal descent has traditionally been considered the main source of affiliation in the Arab world when it comes to membership into an ethnic group or clan.

The Arabs are first mentioned^[where?] in the mid-ninth century BCE as a people living in eastern and southern Syria, and the north of the Arabian Peninsula.

The Arabs appear to have been under the vassalage of the Neo-Assyrian Empire (911–605 BCE), and the succeeding Neo-Babylonian Empire (605–539 BCE), Persian Achaemenid Empire (539–332 BCE), Greek Macedonian/Seleucid Empire and Parthian Empire. Arab tribes, most notably the Ghassanids and Lakhmids begin to appear in the southern Syrian deserts and southern Jordan from the mid 3rd century CE onwards, during the mid to later stages of the Roman Empire and Sasanian Empire.

The relation of ʿarab and ʾaʿrāb is complicated further by the notion of "lost Arabs" al-ʿArab al-ba'ida mentioned in the Qur'an as punished for their disbelief. All contemporary Arabs were considered as descended from two ancestors, Qahtan and Adnan. During the early Muslim conquests of the 7th and 8th centuries, the Arabs forged the Rashidun and then Umayyad Caliphate, and later the Abbasid Caliphate, whose borders touched southern France in the west, China in the east, Anatolia in the north, and the Sudan in the south. This was one of the largest land empires in history.

Arab nationalism is a nationalist ideology that asserts the Arabs are a nation and promotes the unity of Arab people. In its contemporary conception, it is the belief that the Arab people are a people united by language, culture, ethnicity, history, geography and interests, and that one Arab nation will assemble the Arabs within its borders from the Atlantic Ocean to the Arabian Sea.

Many Arabs believe that they are an old nation, exhibiting pride, for example, based on Arabic poetry and other forms of Arabic literature. In the era of the spread of Islam, nationalism was manifested by the identification of Arabs as a distinct nation within Islamic countries. In the modern era, this idea was embodied by ideologies such as Nasserism and Ba'athism, which were common forms of nationalism in the Arab world, especially in the mid-twentieth century. Perhaps the most important form of creating such an Arab state was the establishment of the United Arab Republic between Egypt and Syria, although it was short-lived. To some extent, Arab nationalism gained a new popular appeal as a result of the Arab Spring of the 2010s, calling for Arab social unity, led by the people on the streets, not the authoritarian regimes that had installed the historic forms of nationalism.