| Official Name: | Southside Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kansas |
| Subdivision Type2: | County |
| Subdivision Name2: | Kearny |
| Area Total Km2: | 285.68 |
| Area Land Km2: | 285.51 |
| Area Water Km2: | 0.17 |
| Area Total Sq Mi: | 110.3 |
| Area Land Sq Mi: | 110.24 |
| Area Water Sq Mi: | 0.07 |
| Area Water Percent: | 0.06 |
| Population As Of: | 2000 |
| Population Total: | 359 |
| Population Density Km2: | 1.3 |
| Population Density Sq Mi: | 3.3 |
| Elevation M: | 920 |
| Elevation Ft: | 3018 |
| Coordinates: | 37.8722°N -101.2136°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0471596 |
Southside Township is a township in Kearny County, Kansas, USA. As of the 2000 census, its population was 359.[1]
Southside Township covers an area of 110.3 square miles (285.68 square kilometers); of this, 0.07 square miles (0.17 square kilometers) or 0.06 percent is water.