In the Roman Republic, the term consularis originally designated any senator who had served as consul. The distinction was accompanied by specific privileges and honours, and was a necessary qualification for a number of magistracies: the posts of dictator and his deputy, the magister equitum, the post of censor as well as the governance of certain provinces as proconsuls. The distinction was attached to their wives as well. The status of a consularis could be gained without holding the consulship, either through the adlectio inter consulares or through the award of the consular insignia, but this was done only twice under the late Republic, and only became common practice in the Empire. Under the Empire, a number of senior magistracies were created for consulares:
The position of praefectus urbi, governor of Rome and its environs
Under Hadrian, Italy was divided into four judicial jurisdictions, each with a consularis at its head. This institution was abolished soon after Hadrian's death, however.
Under Alexander Severus, a council of fourteen consulares, the consulares sacrae urbis, was created to assist the praefectus urbi, with each one representing one of the fourteen regions of Rome.
Already in Republican times, certain provinces were reserved for ex-consuls. This tradition carried into the Empire following the division of the provinces into Imperial and Senatorial in 27 BC. Of the latter, two were specifically reserved for consulares, the proconsular provinces of Asia and Africa proconsularis. Consulares could also hold office in Imperial provinces as the Emperor's delegates, alongside senators who had not advanced beyond praetor rank or equestrian governors, who were styled procuratores. There was no fixed system of appointment for the Imperial provinces, but those where more than one legion was garrisoned usually received a governor of consular rank. As the formal title of legatus Augusti did not distinguish between holders of consular and praetorian rank, the former occasionally attached the form consularis to their title, a practice which became commonplace in the 3rd century. As a result, the latter, simpler title began to replace the formal title, and to acquire a generic meaning of "provincial governor". This evolution was formalized in the reforms of Diocletian and Constantine the Great. Aside from its traditional meaning, designating holders of consular rank, the term consularis now came to designate a class of provincial governors. Its holders outranked the correctores and praesides, but were still at the very bottom of the senatorial hierarchy, with the senatorial rank of vir clarissimus, while a holder of consular rank was styled vir illustris. In a handful of cases, serving consulares were raised to proconsular rank, while Valentinian I and Valens gave the consulares of Numidia the exceptional right to be preceded by six instead of five fasces-bearing lictores. According to the Notitia Dignitatum, the following provinces were administered by a consularis: ; in fifteen provinces in the Eastern Roman Empire
The Notitia gives the following staff for a consularis of the West: princeps officii, a cornicularius, two tabularii, an adiutor, a commentariensis, an ab actis, a subadiuva, and various exceptores and cohortalini, i.e. menial staff. For the East, the officium was slightly different: princeps officii, cornicularius, commentariensis, adiutor, numerarius, ab actis, a libellis, and the usual exceptores and cohortalini. The Synecdemus, written some time shortly before 535, lists the following provinces under consulares: Europa, Thracia, Macedonia Prima, Creta, Epirus Nova, Dacia Mediterranea, Hellespontus, Phrygia Pacatiana and Phrygia Salutaris, Lydia, Pisidia, Lycaonia, Pamphylia, Lycia, Caria, Pontica Prima, Galatia, Cappadocia Prima, Helenopontus, Cilicia Prima, Cyprus, Syria Prima, Phoenice, Palaestina Prima, Arabia, and one whose name is illegible. Following the reconquest of North Africa, in 534, Tripolitania was given a consularis, while Numidia was downgraded to a mere praeses. However, in 535 Emperor Justinian I carried out a wide-ranging administrative reorganization. The provinces of Palaestina Secunda, Syria Secunda, Theodorias, Osrhoene, Armenia Secunda, Armenia Magna, Cappadocia Secunda, Rhodope, Haemimontus and Augustamnica were placed under consulares, while Epirus Nova, Dacia Mediterranea, Phrygia Pacatiana, Galatia, Syria Prima and Arabia were placed under governors of other ranks.