| Galluis | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Galluis (Yvelines).svg |
| Arrondissement: | Rambouillet |
| Canton: | Aubergenville |
| Insee: | 78262 |
| Postal Code: | 78490 |
| Mayor: | Annie Gonthier[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 48.7964°N 1.7942°W |
| Elevation M: | 122 |
| Elevation Min M: | 85 |
| Elevation Max M: | 183 |
| Area Km2: | 4.52 |
Galluis (pronounced as /fr/) is a commune in the Yvelines department in the Île-de-France region in north-central France.
The site has been inhabited since the Gallo-Roman epoch.
In 1883, the commune of La Queue-les-Yvelines was detached from Galluis with the dismemberment of the former commune of Galluis-la-Queue.
Antoine-Germain Labarraque (1777 – 1850) was a French chemist and pharmacist, notable for formulating and finding important uses for "Eau de Labarraque" or "Labarraque's solution", a solution of sodium hypochlorite widely used as a disinfectant and deodoriser. He died in Gallius on 9 December 1850.