The gens Mucia was an ancient and noble patrician house at ancient Rome. The gens is first mentioned at the earliest period of the Republic, but in later times the family was known primarily by its plebeian branches.

The patricians were originally a group of ruling class families in ancient Rome. The distinction was highly significant in the Roman Kingdom and the early Republic, but its relevance waned after the Conflict of the Orders. By the time of the late Republic and Empire, membership in the patriciate was of only nominal significance. The social structure of ancient Rome revolved around the distinction between the patricians and the plebeians. The status of patricians gave them more political power than the plebeians, but the relationship between the groups eventually caused the Conflict of the Orders. This time period resulted in changing of the social structure of ancient Rome.