姆拉达-博莱斯拉夫 （捷克语：Mladá Boleslav；德语：Jungbunzlau，永本茨劳）是位于捷克东部、波希米亚中央的一个城市。距捷克首都布拉格东北50公里。姆拉达-博莱斯拉夫是捷克最为富裕的几个城市之一。

Mladá Boleslav (Czech pronunciation:[ˈmladaː ˈbolɛslaf]; German:Jungbunzlau) is a city in the Central Bohemian Region of the Czech Republic, on the left bank of the Jizera river about 50 kilometres (31 miles) northeast of Prague.

Founded in the second half of the 10th century by King Boleslav II as a royal castle. Because there already was a castle known as Boleslav near Prague, this new castle was named Mladá (young) to distinguish it from the older Boleslav, which became known in the 15th century as Stará Boleslav (Old Boleslav). The town received partial city rights in 1334 and 1436, becoming an important site on the road from Prague to northern Bohemia, Lusatia, and Brandenburg. In the 16th century the town was a leading centre of the Unitas Fratrum / Unity of the Brethren / Moravian Church, hosting the Brethren's bishop, Renaissance church, and printing house. After being re-Catholicized in the 17th century, the town's population declined.