| Villaines-sous-Bois | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Villaines-sous-Bois (Val-d'Oise).svg |
| Coordinates: | 49.0775°N 2.3583°W |
| Arrondissement: | Sarcelles |
| Canton: | Fosses |
| Intercommunality: | Carnelle Pays de France |
| Mayor: | Patrice Robin[1] |
| Term: | 2020 - 2026 |
| Area Km2: | 1.89 |
| Insee: | 95660 |
| Postal Code: | 95570 |
Villaines-sous-Bois (in French pronounced as /vilɛn su bwa/) is a commune in the Val-d'Oise department in Île-de-France in northern France. Villaines station has rail connections to Luzarches, Sarcelles and Paris.
Villaines-sous-Bois has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in Villaines-sous-Bois is . The average annual rainfall is with December as the wettest month. The temperatures are highest on average in August, at around, and lowest in January, at around . The highest temperature ever recorded in Villaines-sous-Bois was on 25 July 2019; the coldest temperature ever recorded was on 1 January 1997.