Comitatus may refer to:
Comitatus (warband), a Germanic warband who follow a leader Comitatus, the office of a Roman or early Frankish comes, translated as count. Comitatus, translated as county, a territory such as governed by medieval counts. Comitatus (Kingdom of Hungary), counties in the Kingdom of Hungary Comitatenses, armies of the late Roman Empire Posse comitatus (disambiguation), various meanings
See also
Retinue, a body of persons "retained" in the service of a noble or royal person