| Umm al-Keif | |
| Native Name: | أم الكيف |
| Native Name Lang: | ar |
| Other Name: | Timar |
| Type: | Village |
| Pushpin Map: | Syria |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location of Umm al-Keif in Syria |
| Coordinates: | 36.6758°N 40.3206°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Governorate |
| Subdivision Name1: | al-Hasakah |
| Subdivision Type2: | District |
| Subdivision Name2: | al-Hasakah |
| Subdivision Type3: | Subdistrict |
| Subdivision Name3: | Tell Tamer |
| Population: | 1072 |
| Population Density Km2: | auto |
| Population As Of: | 2004 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Geocode: | C4398 |
Umm al-Keif (Arabic: أم الكيف), also known as Timar[1] [2] (Arabic: تيمر), is a village near Tell Tamer in western al-Hasakah Governorate, northeastern Syria. Administratively it belongs to the Nahiya Tell Tamer.
The village is inhabited by Assyrians belonging to the Assyrian Church of the East, and Arabs.[3] At the 2004 census, it had a population of 1,072.