This is a list of consuls known to have held office, from the beginning of the Roman Republic to the latest use of the title in Imperial times, together with those magistrates of the Republic who were appointed in place of consuls, or who superseded consular authority for a limited period.

From the establishment of the Republic to the time of Augustus, the consuls were the chief magistrates of the Roman state. Traditionally, two were simultaneously appointed for a year-long term, so that the executive power of the state was not vested in a single individual, as it had been under the kings. As other ancient societies dated historical events according to the reigns of their kings, it became customary at Rome to date events by the names of the consuls in office when the events occurred, rather than (for instance) by counting the number of years since the foundation of the city, although that method could also be used. If a consul died during his year of office, another was elected to replace him. Although his imperium was the same as his predecessor's, he was termed consul suffectus, in order to distinguish him from the consul ordinarius whom he replaced; but the eponymous magistrates for each year were normally the consules ordinarii.

Because of this method of dating events, it was important to keep records of each year's eponymous magistrates. Many such lists have survived, either in the form of monumental inscriptions, conventionally referred to as fasti, or indirectly through the ancient historians, who had access to linen rolls recording the names of magistrates. Although these lists account for the entire period of the Republic, and most of Imperial times, there are discrepancies due to gaps and disagreements between different sources. Many of these no doubt arose as copying errors, especially those that involved the substitution of a familiar name for a less common one. Others may represent later attempts to edit the lists in order to explain deficiencies in the record, to reconcile conflicting traditions, or to ascribe particular actions or events to the time of a particular individual.

Occasionally, the authority of the consuls was temporarily superseded by the appointment of a dictator, who held greater imperium than that of the consuls. By tradition, these dictators laid down their office upon the completion of the task for which they were nominated, or after a maximum period of six months, and did not continue in office longer than the year for which the nominating consul had been elected. However, in four years at the end of the fourth century BC, dictators are said to have continued in office in the year following their nomination, in place of consuls. Modern scholars are skeptical of these years, which might be due to later editing of the lists of magistrates in order to fill a gap. All known dictators have been included in this table.

Two other types of magistrates are listed during the period of the Republic. In the year 451 BC, a board of ten men, known as decemviri, or decemvirs, was appointed in place of the consuls in order to draw up the tables of Roman law, in a sense establishing the Roman constitution. According to tradition, a second college of decemvirs was appointed for the next year, and these continued in office illegally into 449, until they were overthrown in a popular revolt, and the consulship was reinstated.

Among the disputes which the decemvirs failed to resolve was the relationship between the patricians, Rome's hereditary aristocracy, and the plebeians, or common citizens. Although it has been argued that some of the consuls prior to the Decemvirate may have been plebeians, the office was definitely closed to them in the second half of the fifth century BC. To prevent open hostility between the two orders, the office of military tribune with consular power, or "consular tribune", was established. In place of patrician consuls, the people could elect a number of military tribunes, who might be either patrician or plebeian.

According to Livy, this compromise held until 376 BC, when two of the tribunes of the plebs, Gaius Licinius Calvus Stolo and Lucius Sextius Lateranus, blocked the election of any magistrates for the following year, unless the senate would agree to place a law before the people opening the consulship to the plebeians, and effecting other important reforms. The senate refused, and the tribunes continued to prevent the election of magistrates for several years until the senate capitulated, and the lex Licinia Sextia was passed, leading to the election of the first plebeian consul in 367. Other accounts of this event are inconsistent, and current scholarly opinion is that the duration of the period without magistrates may have been exaggerated, or even invented to fill a gap in the record; nevertheless Roman tradition unanimously holds that Licinius and Sextius were able to open the consulship to the plebeians.

In Imperial times the consulship became the senior administrative office under the emperors, who frequently assumed the title of consul themselves, and appointed other consuls at will. The consulship was often bestowed as a political favour, or a reward for faithful service. Because there could only be two consuls at once, the emperors frequently appointed several sets of suffecti sequentially in the course of a year; holding the consulship for an entire year became a special honour. As the office lost much of its executive authority, and the number of consuls appointed for short and often irregular periods increased, surviving lists from Imperial times are often incomplete, and have been reconstructed from many sources, not always with much certainty. In many cases it is stated that a particular person had been consul, but the exact time cannot be firmly established.