Dubí is a spa town in Teplice District in the Ústí nad Labem Region of the Czech Republic. It has about 8,100 inhabitants. The name was deriv…Dubí is a spa town in Teplice District in the Ústí nad Labem Region of the Czech Republic. It has about 8,100 inhabitants. 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.