Umbagog Lake
General data
- Name: Umbagog Lake
- Water system: Atlantic Ocean
- Water type: Natural lake
- Progression: Androscoggin River -> Merrymeeting Bay -> Kennebec River -> Gulf of Maine -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
Umbagog Lake is a wilderness lake located in Coös County, New Hampshire, and Oxford County, Maine. It is one of the most pristine lakes in the state of New Hampshire. It lies in the towns of Errol, New Hampshire, and Upton, Maine, as well as the townships of Cambridge, New Hampshire, and Magalloway, Maine.