| Uma Lasan | |
| States: | Malaysia, Indonesia |
| Region: | Borneo |
| Date: | 1981–2006 |
| Ref: | e18 |
| Familycolor: | Austronesian |
| Fam2: | Malayo-Polynesian |
| Fam3: | North Bornean |
| Fam4: | North Sarawakan |
| Fam5: | Kenyah |
| Lc1: | xky |
| Ld1: | Uma Lasan (Sarawak, Malaysia |
| Lc2: | ulu |
| Ld2: | Uma Lung (East Kalimantan and North Kalimantan, Indonesia) |
| Glotto: | uppe1425 |
| Glottorefname: | Upper Pujungan |
| Elp: | 9829 |
| Elpname: | Uma' Lung |
Uma Lasan (Western Kenyah) is a Kayan language of Borneo. Uma Lung is marginally intelligible with the other varieties.