Haldenstein is a former municipality in the Plessur Region in the Swiss canton of Grisons.

Of the rest of the land, 2.1% is settled (buildings or roads) and the remainder (18.4%) is non-productive (rivers, glaciers or mountains).

[5] Before 2017, the municipality was located in the Fünf Dörfer sub-district of the Landquart district, after 2017 it was part of the Plessur Region.

[6] It is located north of Chur and on the left bank of the Rhine River.

The municipality's boundaries are the Rhine and then up the Calanda mountain from the river to the border with the canton of St. Gallen.

[9] The prize-winning architect Peter Zumthor works out of a small studio in Haldenstein.