The Pontic Greeks (Pontic: Ρωμαίοι, Ρωμιοί; Turkish: Pontus Rumları or Karadeniz Rumları; Greek: Πόντιοι, Ελληνοπόντιοι), also Pontian Greeks or simply Pontians, are an ethnically Greek group indigenous to the region of Pontus, in northeastern Anatolia (modern-day Turkey). They share a common Pontic Greek culture that is distinguished by its music, dances, cuisine, and clothing. Folk dances, such as the Serra (also known as Pyrrhichios), and traditional musical instruments, like the Pontic lyra, remain important to Pontian diaspora communities. Pontians traditionally speak Pontic Greek, a modern Greek variety, that has developed remotely in the region of Pontus. Commonly known as Pontiaka, it is traditionally called Romeika by its native speakers.

The earliest Greek colonies in the region of Pontus begin in 700 BC, including Sinope, Trapezus, and Amisos. Greek colonies continued to expand on the coast of the Black Sea (Euxeinos Pontos) between the Archaic and Classical periods. The Hellenistic Kingdom of Pontus was annexed by Rome in 63 BC becoming Roman and later Byzantine territory. During the 11th century AD, Pontus was largely isolated from the rest of the Greek–speaking world, following the Seljuk conquest of Anatolia. After the 1203 siege of Constantinople by the Fourth Crusade, the Empire of Trebizond was established on the Black Sea coast by a branch of the Komnenos dynasty, later known as 'Grand Komnenos'. Anatolia, including Trebizond, was eventually conquered by the Ottomans entirely by the 15th century AD. Greek presence in Pontus remained vibrant during the early modern period up until the 20th century, when, following the Pontic Greek genocide and the 1923 population exchange with Turkey, Pontic Greeks migrated primarily to Greece and around the Caucasus, including in the country of Georgia. Although the vast majority of Pontic Greeks are Orthodox Christians, those who remained in Northeastern Turkey's Black Sea region following the population exchange are Muslim; their ancestors having converted to Islam during the Ottoman period, like thousands of other Greek Muslims.

Today, most Pontic Greeks live in Northern Greece, especially in and around Thessaloniki in Macedonia. Those from southern Russia, Ukraine, and Crimea are often referred to as "Northern Pontic [Greeks]", in contrast to those from "South Pontus", which strictly speaking is Pontus proper. Those from Georgia, northeastern Anatolia, and the former Russian Caucasus are in contemporary Greek academic circles often referred to as "Eastern Pontic [Greeks]" or Caucasian Greeks. The Turkic-speaking Greek Orthodox Urums are included in this latter groups as well. Aside from their predominantly Greek origin, they also likely owe a degree of their ancestry to several sources.

Pontic Greeks are an ethnic Greek subgroup, indigenous to the region of Pontus, in northeastern Anatolia. Greeks have lived in Pontus since "the time of the Argonauts, Herodotus and Xenophon and the Ten Thousand". Pontic Greeks claim descent from ancient Greeks who in the 8th century BC had moved from the Ionian cities located in the islands and shores of the Aegean Sea, to the area of the Black Sea called Pontus. However, as many different ethnic groups have lived in the region since ancient times and have intermarried, present day Pontic Greeks mostly owe their ancestry to ancient Anatolians, other Greeks, other migrants to Pontus, and Caucasian peoples (such as Hellenized Lazs and Armenians).

Pontic Greeks are genetically similar to other groups living in the Caucasus. A genetic study of male Georgians, including Pontic Greeks in Georgia, revealed that the latter had high incidence of haplogroup L, which is also prevalent among Laz people. Haplogroup G2 and haplogroup J2 were also prevalent among the Pontians studied. Pontians in Georgia and Lazes are genetically similar. Armenians in Georgia and Pontians in Georgia are also genetically similar. In addition, the Pontians studied were genetically diverse, indicating genetic mixture with other groups. The region of Pontus has been diverse since at least the Middle Ages; in 1204, the Matzouka (Maçka) region alone contained Greeks, Italians, Lazes and a few Armenians.

In the 21st century, most Pontians strongly identify as Greeks. However, this has not always been the case. Before the creation of the diaspora, many Pontians did not consider themselves Greek.

An ethnicity is made up of people with ancestry or cultural background in common. Self-identification is an important part of belonging to an ethnic group. Pontians have a lot in common with other Greeks; for example, they speak Romeika, a Greek language variety. Pontians also traditionally follow the Greek Orthodox faith, although a minority in Turkey are Sunni Muslims. Pontian Greeks also share traits with other ethnic groups. Like Turks, they cook havítz (kuymak), boortsog, and İmam bayıldı. They share other aspects of their culture with Lazes, Persians, and Armenians. They may owe some aspects of their culture to ancient Anatolian peoples.

The Pontic label is relatively new. Anton Popov writes, "Anthony Bryer states that 'at the beginning of the nineteenth century a Pontic Christian might describe himself in the old way as a Douberites, Phytanos or Tsitenos first, and then as a "Roman" (Rum) Orthodox subject of the sultan; by the end of the century he was calling himself a Greek, and after he had finally left the Pontos in 1923, a Pontic Greek.'" Anton Popov studied Caucasus Greeks in former Soviet territories. Most of the Romeika speakers that Popov interviewed referred to themselves as "Romei." He also mentioned that many Caucasus Greeks only began referring to themselves as Pontians when they went to work in Greece.