| Official Name: | Dahaneh-ye Chahal |
| Native Name: | دهنه چهل |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Mashhad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Razaviyeh |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Pain Velayat |
| Population As Of: | 2006 |
| Population Total: | 191 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.9519°N 60.2236°W |
Dahaneh-ye Chahal (Persian: دهنه چهل; also known as Dahaneh-ye Jahl and Qāsemābād) is a village in Pain Velayat Rural District, Razaviyeh District, Mashhad County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 191, in 45 families.