| Peterson Creek | |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location of the mouth of Peterson 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: | Counties |
| Subdivision Type5: | Townships |
| Length: | 9.5km (05.9miles) |
| Source1: | Unnamed lake |
| Source1 Location: | North Frontenac, Frontenac County |
| Source1 Coordinates: | 45.08°N -76.7806°W |
| Source1 Elevation: | 292m (958feet) |
| Mouth: | South Branch Clyde River |
| Mouth Location: | Lanark Highlands, Lanark County |
| Mouth Coordinates: | 45.1081°N -76.6964°W |
| Mouth Elevation: | 189m (620feet) |
| River System: | Ottawa River drainage basin |
Peterson Creek is a river in the Ottawa River drainage basin in Lanark Highlands, Lanark County and North Frontenac, Frontenac County in eastern Ontario, Canada. It flows 9.5km (05.9miles) from and unnamed lake to its mouth at the South Branch Clyde River.
Peterson Creek begins at an unnamed lake in North Frontenac township at an elevation of 292m (958feet) about 9km (06miles) northwest of the community of Ompah. It flows east to Cruse Lake, then turns northeast and passes through Bobs Lake, takes in an unnamed left tributary arriving from Mountain Lake, and reaches Chathams Lake. The creek continues northeast, passes into Lanark Highlands township, takes in an unnamed left tributary arriving from Twin Lake, and heads east. It takes in a third unnamed left tributary arriving from McIntosh Lake, and reaches its mouth at the South Branch Clyde River at an elevation of 189m (620feet), about 3km (02miles) southwest and upstream of the community of Clyde Forks. The Clyde River flows via the Mississippi River to the Ottawa River.