Eagle, ID is part of Ada County and within close proximity to Boise and is a residential city in Idaho. Eagle, ID is home to Apple Creek Estates, Castlebury Homes, Banbury Meadows, Arbor Ridge, and many other beautiful neighborhoods in the area. Eagle, ID is home to Eagle Island State Park and Arboretum Park. Eagle Island State Park is the state park for Idaho. It is also very close to Boise, meaning it gets a lot of visitors from neighboring cities.