Comitatus may refer to:

• Comitatus (warband), a Germanic warband who follow a leader
• Comitatus, the office of a Roman or 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

• All pages with titles beginning with Comitatus
• Retinue, a body of persons "retained" in the service of a noble or royal person