| Official Name: | Addison Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Shelby |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 28.22 |
| Area Land Sq Mi: | 27.73 |
| Area Water Sq Mi: | 0.5 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 21459 |
| Population Density Sq Mi: | 742.5 |
| Elevation Footnotes: | [2] |
| Elevation M: | 233 |
| Elevation Ft: | 764 |
| Coordinates: | 39.5256°N -85.7692°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 46176[3] |
| Area Code: | 317 and 463 |
| Blank Name: | FIPS code |
| Blank Info: | 18-00568[4] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453083 |
Addison Township is one of fourteen townships in Shelby County, Indiana. As of the 2010 census, its population was 20,585 and it contained 9,237 housing units.[5]
Addison Township was organized in 1823.[6]
According to the 2010 census, the township has a total area of, of which (or 98.26%) is land and (or 1.77%) is water.[5]