Mount Watatic is a 1,832-foot (558 m) monadnock located just south of the Massachusetts–New Hampshire border, in the United States, at the southern end of the Wapack Range.

The name is probably a corruption of the Native American term Wetu-tick, "wigwam brook", and probably applied first to the nearby large stream and thereafter to the mountain and the pond.

In 2002, prior to development of the communications tower, the mountain was purchased for $2,500,000 by the Ashby Land Trust, the Town of Ashby, the Ashburnham Conservation Trust, the Town of Ashburnham, Mass Dept of Fish and Wildlife and Mass Dept of Conservation and Recreation.

The purchase resulted in the permanent protection of approximately 281 acres (1.14 km2) of the mountain, including the summit, as conservation land.

Hikers can find the old grown in trails and remnants of the area's structures still visible on the back side of the mountain.