| Jänijõgi | |
| Name Other: | Jäneda jõgi |
| Image Alt: | A woodland stream |
| Subdivision Type1: | Country |
| Subdivision Name1: | Estonia |
| Source1 Location: | Käravete |
| Mouth Location: | Jägala River |
| Basin Size: | 172 km2 (or 168 km2) |
| Length: | 31.5 km (or 28 km) |
The Jänijõgi (Estonian: Jänijõgi, Estonian: Jäneda jõgi) is a river in the Kõrvemaa region of Estonia. It is a right tributary of the .
The Jänijõgi originates 5.5km (03.4miles) west of Ambla, at the settlement of Käravete in Ambla Parish, 1.2 kilometers northwest of the crossroads, near the southeastern edge of the village of Kukevere. The upper reaches are wooded. The river passes through the village of Jäneda. Records going back to 1591 indicate that the Jäneda Mill on the river was in existence by then.
The river is 31.5km (19.6miles) (or 28km (17miles)) long, with a watershed basin area of 172km2 (or 168km2).
The Tarvasjõgi is a tributary of the Jänijõgi.