Mount Waumbek is a mountain located in Coos County, New Hampshire. The mountain is part of the Pliny Range of the White Mountains. Waumbek is flanked to the northeast by Mount Weeks, to the west by Mount Starr King, and to the southeast by Pliny Mountain (1099 m). Waumbek is drained by various brooks into the Israel River, and thence into the Connecticut River and Long Island Sound.