Map - Canton of Jura (Canton de Jura)

The Republic and Canton of Jura (République et canton du Jura), less formally the Canton of Jura or Canton Jura, is the newest (founded in 1979) of the 26 Swiss cantons, located in the northwestern part of Switzerland. The capital is Delémont. It shares borders with the canton of Basel-Landschaft, the canton of Bern, the canton of Neuchatel, the canton of Solothurn, and the French régions of Bourgogne-Franche-Comté and Grand Est.

The king of Burgundy donated much of the land that today makes up canton Jura to the bishop of Basel in 999. The area was a sovereign state within the Holy Roman Empire for more than 800 years. After the Treaty of Westphalia in 1648 the Jura had close ties with the Swiss Confederation. At the Congress of Vienna (1815), the Jura region became part of the canton of Bern. This act caused dissension. The Jura was French-speaking and Roman Catholic, whereas the canton of Bern was mostly German-speaking and Protestant.

After World War II, a separatist movement campaigned for a secession of Jura from the canton of Bern. After a long and partly militant struggle, which included some arson attacks by a youth organisation Les Béliers, a constitution was accepted in 1977. In 1978, the split was made official when the Swiss people voted in favour, and in 1979, the Jura joined the Swiss Confederation as a full member. The canton celebrated its independence from the canton of Bern on 23 June. However, the southern part of the region, which is also predominantly French-speaking but has a Protestant majority, opted not to join the newly formed canton, instead remaining part of the canton of Bern. The area is now known as Bernese Jura. The word Jura, therefore, may refer either to canton Jura, or to the combined territory of canton Jura and the Bernese Jura. Switzerland as a whole often presents the latter from a touristic standpoint with documentation easily available in French or German.

On creation, the canton adopted the title Republic and Canton of Jura. Other cantons in Switzerland using the title "Republic and Canton" are Ticino, Geneva, and Neuchâtel. In each case, the title refers to the autonomy of the canton and its nominal sovereignty within the Swiss Confederation.

Since 1994, the question of the Jura region has again been controversial. In 2004, a federal commission proposed that the French-speaking southern Jura be united with the canton of Jura, as the language question now seems to be more important than the denominational one. A possible solution would be to create two half-cantons, as reunification with the creation of only a single canton would mean a complete restructuring of the Jura's current political system, with the cantonal capital being transferred from Delémont to Moutier.

On 18 June 2017, the town of Moutier voted to secede from the canton of Bern and join the canton of Jura in a referendum. On 17 September 2017, the nearby municipalities of Belprahon and Sorvilier conversely voted to remain in the canton of Bern. The vote in Moutier was later declared invalid. On 28 March 2021, Moutier voted to secede from Bern and join Jura again in an officially sanctioned referendum. The changeover is expected to be implemented by 2026.