Passumpsic is a Native American word meaning "clear running water" and may refer to:

Geography

*The

Passumpsic River The Passumpsic River () is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed April 1, 2011 tributary of the Connecticut River, in Vermont. Though primarily a Caledonia County river, it i ...

, a tributary of the Connecticut River in Vermont

Ships

* , an oiler that served in the United States Navy from 1946 to 1973 before transferring to the Military Sealift Command and becoming USNS ''Passumpsic'' (T-AO-107) * , an oiler that served in the Military Sealift Command from 1973 to 1991 after service in the United States Navy as USS ''Passumpsic'' (AO-107) {{disambiguation, ship