| Birch Bay State Park | |
| Map: | Washington |
| Relief: | 1 |
| Location: | Whatcom County, Washington, United States |
| Nearest City: | Blaine, Washington |
| Coordinates: | 48.9031°N -122.765°W |
| Area Acre: | 194 |
| Elevation: | 33feet |
| Designation: | Washington state park |
| Established: | 1954 |
Birch Bay State Park is a 194acres Washington state park located 9miles south of Blaine in Whatcom County. The park has of saltwater shoreline on Birch Bay and of freshwater shoreline along Terrell Creek. Recreational opportunities include camping, picnicking, fishing, hiking, crabbing, clamming, and boating.