| Official Name: | Quzlu |
| Native Name: | قوزلو |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ardabil |
| Subdivision Type2: | County |
| Subdivision Name2: | Kowsar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Firuz |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zarjabad |
| Population As Of: | 2006 |
| Population Total: | 458 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 37.6411°N 48.1017°W |
Quzlu (Persian: قوزلو, also Romanized as Qūzlū and Qowzlū; also known as Kozli and Kozly) is a village in Zarjabad Rural District, Firuz District, Kowsar County, Ardabil Province, Iran. At the 2006 census, its population was 458, consisting of 111 families.