Dubí (Czech pronunciation: [ˈdubiː]; German: Eichwald) is a spa town in Teplice District in the Ústí nad Labem Region of the Czech Republic. It has about 8,100 inhabitants.

The town parts and villages of Běhánky, Bystřice, Cínovec, Drahůnky, Mstišov and Pozorka are administrative parts of Dubí.

The name was derived from dub, i.e. 'oak'; the original German name Eichwald means "oak forest". Dubí was named after the extensive oak forests that grew here.

Dubí is located about 5 kilometres (3 mi) northwest of Teplice and 16 km (10 mi) west of Ústí nad Labem. The municipal territory, specifically the village of Cínovec, is located on the Czech-German border. The southern part of the territory with most of the built-up area lies in the Most Basin and the northern part lies in the Ore Mountains. The highest point is the hill Cínovecký hřbet at 881 m (2,890 ft) above sea level. The Bystřice Stream flows through the town.

The first written mentions of Dubí are from the period 1494–1498, when it was a mining settlement of tin miners. Later the town became famous for the production of glass and porcelain, and for spas.

The first spas in Dubí were built in 1860 under the management of Anton Tschinkel, the founder of a local porcelain factory. In 1862, his first spa (Diana's Spa) was opened. The present-day Theresa's Spa with mineral waters, recommended to patients after brain and spine surgeries, have been operating since 1879.

Historical population

Year Pop. ±% 1869 4,431 —     1880 7,747 +74.8% 1890 11,521 +48.7% 1900 17,886 +55.2% 1910 18,825 +5.2%	Year Pop. ±% 1921 17,506 −7.0% 1930 18,599 +6.2% 1950 10,634 −42.8% 1961 11,107 +4.4% 1970 9,412 −15.3%	Year Pop. ±% 1980 9,160 −2.7% 1991 7,815 −14.7% 2001 7,630 −2.4% 2011 7,838 +2.7% 2021 7,560 −3.5%
Source: Censuses

Europe's largest deposits of lithium-bearing mica zinnwaldite are located in the area of Cínovec. As of April 2022, it is estimated to start the mining in 2025 at the earliest, but it remains uncertain whether the Czech Republic will decide on mining due to high environmental demands.

Dubí is an important transit point to Germany on the European route E55. The Cínovec / Altenberg and Cínovec / Zinnwald road border crossings are located within the municipal territory.

The scenic Most–Dubí–Moldava railway line passes through the town. It is a technical monument that was declared a cultural heritage in 1998.

The most important sight in Dubí is the Church of the Immaculate Conception of the Virgin Mary, which was built on the order of princes Clary-Aldringen between 1898 and 1906 as a copy of the Venice church Madonna dell'Orto to serve as their family's church.

Dvojhradí is a hunting lodge in Mstišov, built in 1702–1703. It was completely reconstructed after a fire in 2018. It serves as a restaurant.

• Horst Seemann (1937–2000), German film director and screenwriter
• František Gregor Emmert (1940–2015), composer
• Helmut Novy (born 1944), German ice hockey player

Dubí is twinned with:

• Altenberg, Germany
• Arnstadt, Germany
• Bannewitz, Germany

• Official website
• Theresa's Spa in Dubí