Mount Ellinor is a peak in the Olympic Mountains of Washington, United States.

The mountain is a popular day hike in the summer months; the summit is reachable via a steep-but-brief 3.3-mile (5.3 km) trail which gains about 3,200 feet (980 m) in elevation from the lower trailhead.

There are two trailheads, both of which are accessed from National Forest Road 24 north of Lake Cushman.

In 1853, surveyor George Davidson named the mountain after Ellinor Fauntleroy, his fiancé.

Additionally, views of Lake Cushman, the Hood Canal and the Puget Sound abound.