| Le Port-Marly | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Le Port-Marly (Yvelines).svg |
| Arrondissement: | Saint-Germain-en-Laye |
| Canton: | Chatou |
| Insee: | 78502 |
| Postal Code: | 78560 |
| Mayor: | Cédric Pemba-Marine[1] |
| Party: | MoDem |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Saint Germain Boucles Seine |
| Coordinates: | 48.8967°N 2.1106°W |
| Elevation M: | 24 |
| Elevation Min M: | 22 |
| Elevation Max M: | 108 |
| Area Km2: | 1.44 |
Le Port-Marly (pronounced as /fr/) is a commune in the outer western suburbs of Paris, France. It is located in the Yvelines department in the Île-de-France region, north of Versailles. In 2019, Le Port-Marly had a population of 5,481.