Aamjiwnaang First Nation
| People | Ojibwe | 
|---|---|
| Treaty | Treaty 29 | 
| Headquarters | Sarnia | 
| Province | Ontario | 
| Land | |
| Reserve(s) | Sarnia 45
 | 
| Land area | 12.805 km2 | 
| Population (2025) | |
| On reserve | 901 | 
| On other land | 82 | 
| Off reserve | 1620 | 
| Total population | 2603 | 
| Government | |
| Chief | Janelle Yvonne Nahmabin | 
| Council | 2024–2026 
 | 
| Website | |
| www | |
The Aamjiwnaang First Nation (formerly Chippewas of Sarnia First Nation; Ojibwe: Aamjiwnaang Anishinaabek, lit. 'at the spawning stream') is an Anishinaabe (Ojibwe) First Nations Band located on reserve land by the St. Clair River in Ontario, Canada, three miles south of the southern tip of Lake Huron. The reserve is located across from the United States border from Port Huron, Michigan, and is a result of treaties that were negotiated with the Crown in the 1820s. There are approximately 2,600 band members with about 900 living on the reserve. Their heritage language is Ojibwe.
The word Aamjiwnaang (am-JIN-nun) means "meeting place by the rapid water", which describes the surrounding communities.