|Harriman State Park|
IUCN category V (protected landscape/seascape)
|Location||Fremont County, Idaho, United States|
|Nearest city||Island Park, Idaho|
HARRIMAN STATE PARK (IDAHO) Latitude and Longitude:
|Area||11,000 acres (45 km2) |
|Elevation||6,120 ft (1,870 m) |
|Designation||Idaho state park|
|Established||1977; opened 1982 |
|Administrator||Idaho Department of Parks and Recreation|
|Website||Harriman State Park|
Harriman State Park is a public recreation area located on the 11,000-acre (4,500 ha) Harriman Wildlife Refuge  in Fremont County, three miles (4.8 km) south of Island Park in eastern Idaho, United States. The state park is within the Henry's Fork Caldera in the Greater Yellowstone Ecosystem. It is home to an abundance of elk, moose, sandhill cranes, trumpeter swans, and the occasional black or grizzly bear.  Two-thirds of the trumpeter swans that winter in the contiguous United States spend the season in Harriman State Park. 
The park's acreage was owned by Union Pacific Railroad investors from 1902 to 1977, serving as a cattle ranch and private retreat for the Harriman and Guggenheim families.  It was deeded to Idaho for free in 1977 by Roland and W. Averell Harriman, whose insistence that the state have a professional park managing service helped prompt the creation of the Idaho Department of Parks and Recreation in 1965. The park opened to the public in 1982. 
Friends of Harriman State Park, Inc., a 501(c)(3) organization dedicated to community projects that directly benefit Harriman State Park of Idaho, was formed in 2010 after an announcement by the State of Idaho of the need to cut park funding completely and eventually dissolve the Idaho Department of Parks and Recreation into another state agency,  a contingency that was not put in place. 
Henry's Fork, a fly-fishing stream of note, winds through park meadows for eight miles.  The park offers trails for hiking, biking, and horseback riding. In winter, roads and trails are groomed for cross-country skiing. 
- "Harriman State Park". Geographic Names Information System. United States Geological Survey.
- "Harriman State Park". Idaho Parks and Recreation. Retrieved October 18, 2018.
- "History: State Lands in Idaho". Idaho Museum of Natural History. Retrieved March 4, 2011.
- "Harriman Wildlife Refuge". Important Bird Areas. National Audubon Society. Retrieved October 18, 2018.
- "Friends of Harriman State Park". Friends of Harriman State Park. Retrieved October 18, 2018.
- Betsy Z. Russell (July 6, 2015). "Idaho state parks 'do more with less' five years after budget crunch threatened closures". Idaho Statesman. Retrieved November 19, 2018.
- Mike Lawson (October 11, 2012). "5 Tips on Fishing the Henry's Fork". Rio Products. Retrieved October 18, 2018.
- Harriman State Park Idaho Parks and Recreation
- Harriman State Park and Harriman Wildlife Refuge Boundaries Map Idaho Parks and Recreation
- Friends of Harriman State Park