| Fontaine-le-Sec | |
| Commune Status: | Commune |
| Arrondissement: | Amiens |
| Canton: | Poix-de-Picardie |
| Insee: | 80324 |
| Postal Code: | 80140 |
| Mayor: | Guy Dufour[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Somme Sud-Ouest |
| Coordinates: | 49.9447°N 1.8094°W |
| Elevation M: | 100 |
| Elevation Min M: | 65 |
| Elevation Max M: | 129 |
| Area Km2: | 7.44 |
Fontaine-le-Sec (in French pronounced as /fɔ̃tɛn lə sɛk/; Picard: Fontainne-Sèque) is a commune in the Somme department in Hauts-de-France in northern France.
The commune is situated just off the D29 road, some 13miles south of Abbeville.