The Sinti (masc. sing. Sinto; fem. sing. Sintetsa, Sinta) are a subgroup of the Romani people. They are found mostly in Germany, France, Italy and Central Europe, numbering some 200,000 people. They were traditionally itinerant, but today only a small percentage of Sinti remain unsettled. In earlier times, they frequently lived on the outskirts of communities.

Within the Sinti Community are various tribes such as the Manouche in France. They speak the Sinti-Manouche variety of Romani, which exhibits strong German influence.

The origin of the Sinti people, as with the broader Romani people, lies generally in the Indian subcontinent. A recent study by Estonian and Indian researchers found genetic similarities between European Romani men and Indian men in their sample.

While people from the western Indian subcontinent's Sindh region were mentioned in 1100 by Ahmad ibn Muhammad al-Maydani, it is unclear whether the Sindhi people were the ancestors of modern Sinti, though it is clear that Sinti and other Romani people originated in the northern Indian subcontinent.

The origin of the name is disputed. Scholar Jan Kochanowski, and many Sinti themselves, believe it derives from Sindhi, the name of the people of Sindh in medieval India (a region now in southeast Pakistan). Romani Historian Ian Hancock states that the connection between Sinti and Sindhi is not tenable on linguistic grounds and that in the earliest samples of Sinte Romani, the endonym of Kale was used instead.

Scholar Yaron Matras argued that Sinti is a later term in use by the Sinti from only the 18th century on, and is likely a European loanword. This view is shared by Romani linguist Ronald Lee, who stated the name's origin probably lies in the German word Reisende, meaning 'travellers'.

The Sinti arrived in Austria and Germany in the Late Middle Ages as part of the emigration from the Indian Subcontinent, eventually splitting into two groups: Eftavagarja ("the Seven Caravans") and Estraxarja ("from Austria"). They arrived in Germany before 1540. The two groups expanded, the Eftavagarja into France and Portugal, where they are called "Manouches", and to the Balkans, where they are called "Ciganos" (from Byzantine Greek "τσιγγάνος" and "Ἀτσίγγανος", deriving from Ancient Greek "ἀθίγγανος", meaning "untouchable"); and the Estraxarja into Italy and Central Europe, mainly what are now Croatia, Slovenia, Hungary, Romania, the Czech Republic and Slovakia, eventually adopting various regional names.

From 1926 to 1973, Pro Juventute, a Swiss children's charity, with the support of Swiss authorities, committed crimes against humanity against the Yenish, Manouche, and Sinti people in Switzerland by forcibly removing children from their families and placing them in foster homes, adoptive families, and correctional institutions through the Kinder der Landstrasse (Children of the Open Road) project. This was part of a wider effort to forcibly assimilate these traditionally nomadic communities into the sedentary Swiss society. In February 2025, the Swiss government formally acknowledged that the forced removals and assimilation efforts constitute a crime against humanity under international law.