| Christian Island 30A | |
| Official Name: | Christian Island Indian Reserve No. 30A |
| Settlement Type: | Indian reserve |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 44.8167°N -87°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Simcoe |
| Subdivision Type3: | First Nation |
| Subdivision Name3: | Beausoleil |
| Area Land Km2: | 0.11 |
| Population Footnotes: | [1] |
| Population Total: | 42 |
| Population As Of: | 2016 |
| Population Density Km2: | 395.1 |
| Website: | www.chimnissing.ca |
Christian Island 30A is a First Nations reserve in Simcoe County, Ontario. It is one of the reserves of the Beausoleil First Nation. It had a population of 42 in the 2016 Census, up from 36 in the 2011 Census.[2]