This chapter analyses synchronically and diachronically the Maghrebi Arabic dialects spoken in North Africa, whose most outstanding features are the prefix n- for the first person singular of the imperfect and a vowel system characterized by elision of short vowels in open syllable. Maghrebi Arabic shows less variety than do Middle Eastern dialects and has been influenced by only two substrate languages, Berber and Latin (the latter especially in Mediterranean coastal towns). All Maghrebi dialects have far fewer Turkish loanwords than do Middle Eastern dialects. On the other hand, French influence on the vocabularies of Tunisian, Algerian, and Moroccan dialects is strong, and code-switching between Arabic and French common in North African language use (except in Libya and Malta). Diachronically, Maghrebi Arabic dialects are divided into two types—pre-Hilālī and Hilālī— depending on whether they go back to the first or the second wave of the Arabization of North Africa.