Mount Tecumseh is a mountain located in Grafton County, New Hampshire. The mountain is named after the Shawnee leader Tecumseh (c.1768-1813), and is a part of the White Mountains. The east side of Tecumseh drains into the Mad River; the west side drains into several brooks. All are tributaries of the Pemigewasset River, which drains into the Merrimack River and thence into the Gulf of Maine in Massachusetts.