| Rainy Creek | |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location of the mouth of Rainy Creek in southern Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Eastern Ontario |
| Subdivision Type4: | County |
| Subdivision Name4: | Lennox and Addington |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Addington Highlands |
| Length: | 9.5km (05.9miles) |
| Source1: | Unnamed marsh |
| Source1 Coordinates: | 44.8889°N -77.3928°W |
| Source1 Elevation: | 349m (1,145feet) |
| Mouth: | Skootamatta River |
| Mouth Coordinates: | 44.9019°N -77.29°W |
| Mouth Elevation: | 315m (1,033feet) |
| River System: | Great Lakes Basin |
Rainy Creek is a creek in the Moira River and Lake Ontario drainage basins in Addington Highlands, Lennox and Addington County, Ontario, Canada.
Rainy Creek begins in an unnamed marsh at an elevation of 349m (1,145feet), 1.2km (00.7miles) north of Grimsthorpe Lake on the sister tributary of the Skootamatta River, Partridge Creek. It flows south, then turns east for the rest of its run. The creek reaches Rainy Lake at an elevation of 325m (1,066feet), and enters Bon Echo Provincial Park. The creek then reaches its mouth at the Skootamatta River at an elevation of 315m (1,033feet), between Joeperry Lake and Pearson Lake and about 12.5km (07.8miles) northwest of the community of Cloyne.