Madulain ([mɐduˈlaɪ̯n]ⓘ) is a municipality in the Maloja Region in the Swiss canton of Graubünden.

[3] Guardaval Castle was built near the village of Madulain in the 13th century to administer the estates of the Bishop of Chur in the Upper Engadine.

In 1409 the Bishop had to pledge the castle to the League of God's House to pay off some of his debts.

Under the League, the castle was no longer an administrative center and was abandoned, falling into ruin.

Over the same time period, the amount of recreational space in the municipality increased by 14 ha (35 acres) and is now about 0.98% of the total area.

Over the same time period the amount of forested land has increased by 9 ha (22 acres).

It is located in the upper Engadin valley between La Punt Chamues-ch and Zuoz about 15 minutes from St. Moritz on the Inn River.

[15] Currently, a minority of the population speaks the Upper-Engadin Romansh dialect of Puter, though until the early 19th Century the entire village spoke it.

Due to increasing trade with the outside world, Romansh usage began to decline.

Of these, a total of 15 people worked in 5 businesses in the primary economic sector.

[18] In 2015 the average cantonal, municipal and church tax rate in the municipality for a couple with two children making SFr 80,000 was 3.3% and the rate for a single person making SFr 150,000 was 14.1%.