| Ar-Rutba District | |
| Native Name: | قضاء الرطبة |
| Settlement Type: | District |
| Pushpin Label Position: | right |
| Subdivision Type: | Country |
| Subdivision Name: |  Iraq |
| Subdivision Type1: | Governorates |
| Subdivision Name1: | Al Anbar Governorate |
| Seat: | Ar-Rutba |
| Area Total Km2: | 93445 |
| Population Footnotes: | 2018 |
| Population Total: | 47040 |
| Population Density Km2: | auto |
| Timezone: | AST |
| Utc Offset: | +3 |
| Coordinates: | 33.0381°N 40.2844°W |
Ar-Rutba District (Arabic: قضاء الرطبة) is the largest district by area in Al Anbar Governorate also the largest in the entirety of Iraq, covering 93,445 km2, and the least populated in relative and absolute terms in Anbar Governorate, with a population of 47,040 or 0.5112 per km2.[1] It is also the southernmost district of Al Anbar Governorate, the westernmost of the whole country, and the only district nationwide bordering Jordan. It is centred on the town of Ar-Rutba.