Pennacook
| Total population | |
|---|---|
| extinct as a tribe | |
| Regions with significant populations | |
| southern Maine , northeastern Massachusetts , southern New Hampshire | |
| Languages | |
| unattested Algonquian language | |
| Religion | |
| Indigenous religion | 
The Pennacook, also known by the names Penacook and Pennacock, were Algonquian Indigenous people who lived in what is now Massachusetts, New Hampshire, and southern Maine. They were not a united tribe but a network of politically and culturally allied communities. Penacook was also the name of a specific Native village in what is now Concord, New Hampshire.
The Pennacook were related to but not a part of the original Wabanaki Confederacy, which includes the Miꞌkmaq, Maliseet, Passamaquoddy, and Penobscot peoples.