Hinterrhein District Bezirk Hinterrhein District dal Rain Posteriur
District
Country	Switzerland
Canton	Graubünden
Capital	Thusis
Area
• Total	617.63 km2 (238.47 sq mi)
Population  (2020)
• Total	13,179
• Density	21/km2 (55/sq mi)
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)
Municipalities	24

Hinterrhein District is a former administrative district in the canton of Graubünden, Switzerland. It had an area of 617.67 km² (238.48 sq mi) and had a population of 13,179 in 2015. Much of the district became part of the Viamala Region on 1 January 2017 as part of a reorganization of the Canton.^[1]

Hinterrhein District consisted of five Kreise (sub-districts) and twenty-four municipalities. This number decreased from thirty-two when the municipalities of Portein, Präz, Sarn, and Tartar merged on 1 January 2010 into Cazis.^[2] It decreased further in 2015 when Almens, Paspels, Pratval, Rodels and Tomils merged to form the new municipality of Domleschg.^[2]

^a Includes the area of Portein, Präz, Sarn and Tartar which merged into Cazis on 1 January 2010.

Mergers

• On 1 January 2003 the municipalities of Donath and Patzen-Fardün became part of Donat.
• On 1 January 2006 Medels im Rheinwald became part of Splügen.
• On 1 January 2009 Tomils was created through the merger of Feldis/Veulden, Scheid, Trans and Tumegl/Tomils.
• On 1 January 2010 Portein, Präz, Sarn and Tartar merged into Cazis.
• On 1 January 2015 Almens, Paspels, Pratval, Rodels and Tomils merged to form Domleschg.

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