| Kariz-e Hajj Mohammad Jan | |
| Native Name: | Persian: كاريز حاج محمد جان |
| Native Name Lang: | fa |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Coordinates Footnotes: | [1] |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Fariman |
| Subdivision Type3: | District |
| Subdivision Name3: | Qalandarabad |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sefid Sang |
| Unit Pref: | Metric |
| Population As Of: | 2016 |
| Population Total: | 1821 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
Kariz-e Hajj Mohammad Jan (Persian: كاريز حاج محمد جان) is a village in Sefid Sang Rural District of Qalandarabad District, Fariman County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 1,438 in 330 households.[2] The following census in 2011 counted 1,668 people in 419 households.[3] The 2016 census measured the population of the village as 1,821 people in 512 households. It was the most populous village in its rural district.[4]