Kuči (Montenegrin and Serbian: Кучи, Kuči; Albanian: Kuçi, pronounced [ˈkutʃi]) is a tribe of Albanian origin, historically located in modern central and eastern Montenegro (Brda region), north-east of Podgorica, extending along the border with Albania. Processes of Slavicisation during the Ottoman era and onwards facilitated ethno-linguistic shifts within much of the community. As such, people from the Kuči today largely identify themselves as Montenegrins and Serbs, with a minority still identifying as Albanians. In other areas such as the Sandžak, many Muslim descendants of the Kuči today identify as Bosniaks.

The Kuči first appear in historical records in 1330 as a brotherhood from an Albanian katun under the jurisdiction of the Dečani Monastery. The region itself is first mentioned in 1485 as a nahiyah of the Sandjak of Shkodra. Over time, several waves of settlers came to populate the region and form the historical community of Kuči. The region is known for its resistance against Ottoman rule and its key role in the creation of modern Montenegro. Until the 17th century, the Kuči region was equally Orthodox and Catholic. Today, it is mostly Orthodox except for the Catholic community of Koja. Muslim converts appear since 1485. In the 17th and 18th centuries, both voluntarily and non-voluntarily many people from the pleme began to settle in the Plav-Gusinje, Rožaje and the wider Sandžak region. Many of their descendants identify as Muslim Bosniaks.

The history of the people of Kuči represents the diversity of the area and its location at the crossroads between different cultures and religions. As such, alongside Marko Miljanov (1833–1901), a national hero of Montenegro who led the tribe in the Montenegrin-Ottoman Wars in 1861–62 and 1876–78, people of Kuči ancestry include and Jakup Ferri (1832–1879), a national hero of Albania who fought against Miljanov's annexation of his home territory Plav to Montenegro. Modern individuals include Momir Bulatović, a Montenegrin politician and the first President of the Republic of Montenegro and Fahrudin Radončić, a Bosniak politician and former Minister of Security of Bosnia and Herzegovina.

The name appears in several Albanian inhabited territories, including toponyms in Shkodër, Tirana, Berat, Vlorë and Korçë, as well as anthroponyms and toponyms among the medieval Albanian communities of the Peloponnese, for example the village of Kuçi (modern Chelidoni, known until 1955 as Koutsi) is recorded as an Albanian settlement (cemā'at-i Arnavudān) in 1460–3. According to Giuseppe Valentini, also the Arbëreshë surname Cuccia directly corresponds to the tribal name of the Kuči. Valentini makes further connections to the Albanian Kuçi of medieval Greece, noting that the Sicilo-Arbëreshë Cuccia family descends from a certain Pietro Cuccia who arrived from Greece in 1467. The surname appears at least 19 times among Albanian stradioti recorded between 1482 and 1547, and Valentini notes various toponyms connected to the tribal name across Albania and Arvanite settlements in Greece. According to the tradition of the Berisha tribe, the Old Kuči is called Berisha i Kuq (Red Berisha) as opposed to Berisha i Bardh (White Berisha), which is used for Berisha of Pukë, Mërturi and a part of Piperi that traces its origin from Berisha.

The etymology of Kuči (Albanian: Kuçi) is unclear.

Many scholars have adopted the view that the etymology of the name is from Albanian kuq (Gheg Albanian [/kut͡ʃ/], kuç in the Albanian alphabet) "red", ultimately from Latin coccaeus evolved through Albanian phonetic changes. It was first proposed by Gustav Meyer and adopted by Pavle Ivić, Petar Šimunović and many others.

Alternative etymologies from Albanian sources include kuç ("puppy, doggie") suggested by Biris (1998), and kuci ("place of high altitude, summit, steep high rock") suggested by Sarris (1928) and Fourikis (1929). Stanišić proposes a derivation from Romanian cuci ("hills"), from a similar source to Albanian kuci ("place of high altitude"). Idriz Ajeti and Eqrem Çabej considered kuq improbable and proposed a derivation from kuç ("earthen pot", figuratively "valley") as a geographical reference to valley dwellers as the name is widespread in Albanian-speaking groups.

Aleksandar Loma suggests a potential, albeit unclear, connection to the toponym Kučevo for which he proposes a number of Slavic (f.e., *kučь meaning "Eurasian bittern", *kuti meaning "smith") and non-Slavic etymologies; as well as connections to Polish toponyms Kucz and Kuczów.