| Siksika 146 | |
| Official Name: | Siksika Indian Reserve No. 146 |
| Settlement Type: | Indian reserve |
| Subdivision Type: | First Nation |
| Subdivision Name: | Siksika Nation |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Alberta |
| Subdivision Type3: | Municipal districts |
| Subdivision Name3: | Vulcan Wheatland |
| Seat Type: | Headquarters |
| Seat: | Gleichen |
| Leader Title: | Chief |
| Unit Pref: | Metric |
| Area Footnotes: | [1] |
| Area Land Km2: | 701.96 |
| Population As Of: | 2021 |
| Population Total: | 3576 |
| Population Density Km2: | 4.96 |
Siksika 146 is a First Nations reserve of the Siksika Nation in southern Alberta, Canada.[2] It is 87km (54miles) southeast of Calgary at an elevation of 857m (2,812feet).
The locality of Siksika is on the Siksika 146 reserve.[3] The reserve is bordered by Vulcan County, Wheatland County, and the County of Newell and is home to the Blackfoot Crossing historical park.
In the Canada 2021 Census, Siksika 146 recorded a population of 3,576. The reserve has a land area of 696.54km2, making it the second-largest Indigenous reserve in Canada (after Blood 148, Alberta).