| Al Mithnab | |
| Official Name: | Al Mithnab |
| Native Name: | محافظة المذنب |
| Settlement Type: | Governorate |
| Pushpin Map: | Saudi Arabia#Middle East |
| Subdivision Type: | Country |
| Subdivision Name: |  Saudi Arabia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Al-Qassim Region |
| Elevation M: | 632 |
| Population Total: | 44,043 |
| Population As Of: | [1] |
| Timezone: | AST |
| Utc Offset: | +3 |
| Timezone Dst: | AST |
| Utc Offset Dst: | +3 |
Al Mithnab (Arabic: المذنب) is one of the governorates in Al-Qassim Region, Saudi Arabia.[2] [3]