| Lieusaint | |
| Commune Status: | Commune |
| Arrondissement: | Cherbourg |
| Canton: | Valognes |
| Insee: | 50270 |
| Postal Code: | 50700 |
| Mayor: | Jean-Paul Lemoigne[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Cotentin |
| Coordinates: | 49.4756°N -1.4767°W |
| Elevation M: | 20 |
| Elevation Min M: | 9 |
| Elevation Max M: | 44 |
| Area Km2: | 5.22 |
Lieusaint (in French pronounced as /ljøsɛ̃/) is a commune in the Manche department in Normandy in north-western France.