| Saint-Louis-du-Nord Arrondissement | |
| Native Name: | Sen Lwi dinò Awondisman |
| Native Name Lang: | ht |
| Settlement Type: | Arrondissement |
| Subdivision Type: | Country |
| Subdivision Type1: | Department |
| Subdivision Name1: | Nord-Ouest |
| Area Total Km2: | 187.74 |
| Area Urban Km2: | 3.47 |
| Area Rural Km2: | 184.27 |
| Population Total: | 146567 |
| Population As Of: | 2015 |
| Population Density Km2: | auto |
| Population Urban: | 46605 |
| Population Rural: | 99962 |
| Postal Code Type: | Postal code |
| Postal Code: | HT32 - |
| Utc Offset1: | -5 |
| Timezone1: | Eastern |
| Blank Name Sec1: | Communes |
| Blank Info Sec1: | 2 |
| Blank1 Name Sec1: | Communal Sections |
| Blank1 Info Sec1: | 9 |
| Blank Name Sec2: | IHSI Code |
| Blank Info Sec2: | 092 |
Saint-Louis-du-Nord (Haitian; Haitian Creole: Sen Lwi dinò) is an arrondissement in the Nord-Ouest department of Haiti. As of 2015, the population was 146,567 inhabitants.[1] Postal codes in the Saint-Louis-du-Nord Arrondissement start with the number 32.
The arondissement consists of the following municipalities: