Egyptian Arabic, locally known as Colloquial Egyptian (Arabic: العامية المصرية‎, [el.ʕæmˈmejjæ l.mɑsˤˈɾejjɑ]), or simply Masri (مَصرى), is the spoken vernacular Arabic dialect of Egypt.

Egyptian is a dialect of the Arabic language, which is part of the Afro-Asiatic language family. It originated in the Nile Delta in Lower Egypt. Egyptian Arabic evolved from the Quranic Arabic which was brought to Egypt during the seventh-century AD Muslim conquest that aimed to spread the Islamic faith among the Egyptians. Egyptian Arabic is influenced by the Egyptian Coptic language in its grammar structure which was the native language of the vast majority of Nile Valley Egyptians prior to the Islamic conquest and later it had influences by European and foreign languages such as French, Italian, Greek, Turkish and English. The 100 million Egyptians speak a continuum of dialects, among which Cairene is the most prominent. It is also understood across most of the Arabic-speaking countries due to broad Egyptian influence on the region. Furthermore, Egyptian media including cinema has had a big influence in the MENA region for more than a century, along with the music industry. These factors help to make it the most widely spoken and by far the most widely studied variety of Arabic.

While it is primarily a spoken language, the written form is used in novels, plays and poems (vernacular literature), as well as in comics, advertising, some newspapers and transcriptions of popular songs. In most other written media and in television news reporting, Literary Arabic is used. Literary Arabic is a standardized language based on the language of the Quran, that is, Classical Arabic. The Egyptian vernacular is almost universally written in the Arabic alphabet for local consumption, although it is commonly transcribed into Latin letters or in the International Phonetic Alphabet in linguistics text and textbooks aimed at teaching non-native learners.