Elgg is a municipality in the district of Winterthur in the canton of Zürich in Switzerland. On 1 January 2018 the former municipality of Hofstetteā¦Elgg is a municipality in the district of Winterthur in the canton of Zürich in Switzerland. On 1 January 2018 the former municipality of Hofstetten merged into the municipality of Elgg. Elgg is first mentioned between 760 and 763 as Ailaghoga. In 1166 it was mentioned as Elgoue and in 1370 as Elggaw.