Ilanz (Romansh: Glion) is a former municipality in the district of Surselva in the Swiss canton of the Grisons . The former municipality of Ilanz was congruent with the town of Ilanz. On 1 January 1978, the former municipality of Strada merged into the new municipality of Ilanz. On 1 January 2014, the municipality of Ilanz and the surrounding municipalities Castrisch , Ladir , Luven , Pitasch , Riein , Ruschein , Schnaus , Sevgein , Duvin , Pigniu , Rueun and Siat merged into the new municipality of Ilanz/Glion .

Ilanz is first mentioned in 765 as "Iliande." Ilanz became the capital of the newly formed Grey League in 1395. The Grey League was the second of the Three Leagues which eventually formed canton of the Grisons.