| Obelis | |
| Source1 Coordinates: | 55.3231°N 24.4875°W |
| Mouth Coordinates: | 55.2704°N 23.9582°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | Region |
| Discharge1 Avg: | 2.7 m³/s |
| Discharge1 Max: | 227 m³/s |
| Discharge1 Min: | 0.001 m³/s |
| Basin Size: | 673.8km2 |
| Tributaries Right: | Rudekšna, Indija, Šumera, Suleva, Malčius II, Malčius |
The Obelis is a river in the Ukmergė district municipality and Kėdainiai district municipality in central Lithuania. It flows for and has a basin area of 673.8km2. It is a left tributary of the Nevėžis into which it flows near Kėdainiai.
The river valley is 200–220 m wide and 8–14 m high. The width of the river course is 5–12 m. The rapidness of the current is 0,2–0,3 meters per second. Kapliai Reservoir, Bubliai Reservoir and Juodkiškiai Reservoir dam the Obelis river. It flows through Paobelys, Šėta, Aukštieji Kapliai, Aristava, Paobelys, and meets the Nevėžis in Kėdainiai.
The river name Obelis derives from the Lithuanian word obelis ('apple tree').