Lebanese Arabic (Arabic: عَرَبِيّ لُبْنَانِيّ‎, romanized: ʿarabiyy lubnāniyy, Lebanese: ʿarabe libnēne), or simply Lebanese (Arabic: لُبْنَانِيّ‎, romanized: lubnāniyy, Lebanese: libnēne), is a variety of North Levantine Arabic, indigenous to and spoken primarily in Lebanon, with significant linguistic influences borrowed from other Middle Eastern and European languages and is in some ways unique from other varieties of Arabic. Due to multilingualism and pervasive diglossia among Lebanese people (a majority of the Lebanese people are bilingual or trilingual), it is not uncommon for Lebanese people to code-switch between or mix Lebanese Arabic, English, and French in their daily speech. It is also spoken among the Lebanese diaspora.

Lebanese Arabic is a descendant of the Arabic dialects introduced to the Levant in the 7th century AD, which gradually supplanted various indigenous Northwest Semitic languages to become the regional lingua franca. As a result of this prolonged process of language shift, Lebanese Arabic possesses a significant Aramaic substratum, along with later non-Semitic adstrate influences from Ottoman Turkish, English, and French. As a variety of Levantine Arabic, Lebanese Arabic is most closely related to Syrian Arabic and shares many innovations with Palestinian and Jordanian Arabic.