Comitatus-the name for an Anglo Saxon kinship group Comitatus (Latin for company, armed group) may refer to:
- Comes, a Latin word with similar meaning
- Comitatenses, the Roman late Imperial mobile army
- Comitatus (classical meaning), a political term used in various meanings, in Europe's classical period and in the Middle Ages
- County, in the Middle Ages, in the sense of a territory under a count — also used sporadically in present-day legal texts
- a Hungarian administrative unit:
- Comitatus (Kingdom of Hungary), in the Kingdom of Hungary
- Counties of Hungary, administrative units in today's Hungary
- an administrative unit in the First Bulgarian Empire ruled by a komita and further subdivided into several zhupi, each ruled by a zhupan. Also comitat or komitat.