Skalsko is a municipality and village in Mladá Boleslav District in the Central Bohemian Region of the Czech Republic. It has about 400 inhabitants. Most of the village has well preserved character and is protected by law as a village monument zone.

The name is derived from the Czech word skála ('rock'). The suffix -sko indicates that the village may have been founded on the site on an abandoned village (called Skála or Skály) and partially took its name.

Skalsko is located about 10 kilometres (6 mi) west of Mladá Boleslav and 39 km (24 mi) northeast of Prague. It lies in the Jizera Table, on an elevated plateau above the stream Strenický potok.

The first written mention of Skalsko is from 1352. From 1632 to 1785, the village was property of the Servite Order. The Servits had built here a castle as their summer residence. From 1809 to 1843, Skalsko was owned by Count Karel of Rohan. The last feudal owners were the Thurn und Taxis family.

Historical population

Year Pop. ±% 1869 558 —     1880 562 +0.7% 1890 554 −1.4% 1900 588 +6.1% 1910 650 +10.5%	Year Pop. ±% 1921 572 −12.0% 1930 556 −2.8% 1950 378 −32.0% 1961 367 −2.9% 1970 337 −8.2%	Year Pop. ±% 1980 298 −11.6% 1991 310 +4.0% 2001 371 +19.7% 2011 397 +7.0% 2021 382 −3.8%
Source: Censuses

Skalsko is located on the railway line Mladá Boleslav–Mladějov.

The main landmark of Skalsko is the Church of Saint Gall. It was built in the 14th century and rebuilt in the Baroque style in the first half of the 18th century.

The Skalsko Castle was originally a Baroque building from the 17th century, rebuilt in the Neoclassical style in 1878. Today it houses a secondary school.

Most of the village is protected as a village monument zone for its set of timber buildings dating from the 18th to the beginning of the 19th century, supplemented by other valuable buildings from the first half 19th century.

• Official website