Commune in Auvergne-Rhône-Alpes, France Sainte-Hélène-du-Lac Commune The church in Sainte-Hélène-du-Lac Location of Sainte-Hélène-du-Lac Sainte-Hélène-du-Lac Show map of France Sainte-Hélène-du-Lac Show map of Auvergne-Rhône-Alpes Coordinates: 45°28′59″N 6°04′00″E﻿ / ﻿45.4831°N 6.0667°E﻿ / 45.4831; 6.0667Coordinates: 45°28′59″N 6°04′00″E﻿ / ﻿45.4831°N 6.0667°E﻿ / 45.4831; 6.0667 Country France Region Auvergne-Rhône-Alpes Department Savoie Arrondissement Chambéry Canton Montmélian Government • Mayor (2020–2026) Sylvie Schneider Area 1 7.09 km2 (2.74 sq mi) Population (Jan. 2019)[1] 793 • Density 110/km2 (290/sq mi) Time zone UTC+01:00 (CET) • Summer (DST) UTC+02:00 (CEST) INSEE/Postal code 73240 /73800 Elevation 252–370 m (827–1,214 ft) 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.