| Siletz Bay State Airport | |
| Faa: | S45 |
| Type: | Public |
| Operator: | Oregon Department of Aviation |
| Location: | Gleneden Beach, Oregon |
| Elevation-F: | 69 |
| Elevation-M: | 21 |
| R1-Number: | 17/35 |
| R1-Length-F: | 3300 |
| R1-Length-M: | 1006 |
| R1-Surface: | Asphalt |
Siletz Bay State Airport is a public airport located one mile (1.6 km) southeast of Gleneden Beach in Lincoln County, Oregon, United States. The airfield is located to the south of its namesake Siletz Bay.