| John Boyd Thacher State Park | |
|---|---|
 View from the overlook | |
  | |
| Type | State Park |
| Location | Albany County, New York, United States |
| Coordinates | 42°39′21″N 74°01′09″W / 42.655833°N 74.019167°W |
| Area | 2,155 acres (872 ha) |
| Created | 1914 |
| Operated by | New York State |
John Boyd Thacher State Park is a state park located 15 miles (24 km) southwest of Albany, New York, near Voorheesville, in Albany County on State Route 157. Located mostly atop the Helderberg Escarpment, the park has several hiking trails that offer panoramic views of the Green Mountains in Vermont and the Taconic Mountains of the Hudson Valley.