Nine Eagles State Park, State park in Decatur County, United States.

Nine Eagles State Park covers 1,100 acres (450 ha) in Decatur County near Davis City, Iowa, in a hilly area and with a 64-acre (26 ha) lake. It has 9 miles (14 km) of hiking trails through forest and prairie, including a 3-mile (4.8 km) loop around the lake, plus a 7-mile (11 km) horse trail open to snowmobiles in winter. The lake has a beach, a boat ramp, a jetty and five smaller docks, and the park holds three developed campgrounds with electric and non-electric sites, a family cabin and primitive equestrian campsites.

Nine Eagles State Park takes its name from the Nine Eagles, a group of nine eagles said to have nested in the area. The land was assembled for public recreation and became an Iowa state park; today it covers 1,100 acres in Decatur County near Davis City, with a 64-acre lake at its centre.

The park's name comes from the Nine Eagles band of the Southern Iowa or Sac and Fox peoples, who lived in the region before their 1830s removal to Kansas. Visitors today hike nine miles of trails, ride a seven-mile horse trail open to snowmobiles in winter, and fish the lake for bluegill, channel catfish and largemouth bass.

Nine Eagles State Park lies near Davis City in Decatur County, about 15.6 km west of Lamoni. The 7-mile horse trail doubles as a snowmobile route in winter, while the 3-mile path circles the lake. A boat ramp, a jetty and five smaller docks give access to the 64-acre lake for fishing and boating.

The park's 7-mile horse trail doubles as a snowmobile route in winter, and the lake holds bluegill, channel catfish and largemouth bass. A 3-mile path circles the 64-acre lake, passing a beach, boat ramp, jetty and five smaller docks.