| Port Louis | |
| Native Name: | French: Port-Louis |
| Native Name Lang: | "fr" |
| Settlement Type: | District |
| Coordinates: | -20.1667°N 88°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Mauritius |
| Established Title: | Settled |
| Government Type: | City Council |
| Government Footnotes: | [1] |
| Leader Title: | Lord Mayor |
| Leader Name: | Mr. Hoseenally Aslam Adam |
| Leader Title1: | Deputy Lord Mayor |
| Leader Name1: | Mrs. Chukowry M. Christianne Dorinne |
| Area Total Km2: | 42.7 |
| Population Footnotes: | [2] |
| Population Total: | 118,123 |
| Population As Of: | 2019 |
| Population Rank: | 4th in Mauritius |
| Population Density Km2: | auto |
| Timezone1: | MUT |
| Utc Offset1: | +4 |
| Iso Code: | MU-PL (Port Louis) |
Port Louis (French: Port-Louis) is a district of Mauritius, located in the northwest of the island, it is the island nation's smallest district and has the highest population density. The district wholly encompasses Port Louis, the capital of the country. Port Louis district has an area of 42.7 km2 and the estimated population was 118,123 at the end of 2019.[2]
The district hosts the Aapravasi Ghat, a UNESCO World Heritage Site since 2006.