Gif-sur-Yvette Commune Saint-Rémi church in Gif-sur-Yvette Coat of arms Gif-sur-Yvette Location within Île-de-France region Gif-sur-Yvette Coordinates: 48°42′06″N 2°08′02″E﻿ / ﻿48.7018°N 2.1339°E﻿ / 48.7018; 2.1339Coordinates: 48°42′06″N 2°08′02″E﻿ / ﻿48.7018°N 2.1339°E﻿ / 48.7018; 2.1339 Country France Region Île-de-France Department Essonne Arrondissement Palaiseau Canton Gif-sur-Yvette Intercommunality CA Paris-Saclay Government • Mayor (2014–2020) Michel Bournat Area1 11.60 km2 (4.48 sq mi) Population (2008)2 21,248 • Density 1,800/km2 (4,700/sq mi) Time zone CET (UTC+1) • Summer (DST) CEST (UTC+2) INSEE/Postal code 91272 /91190 Elevation 57–172 m (187–564 ft) (avg. 61 m or 200 ft) 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries. 2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.