| Official Name: | Ada Township, South Dakota |
| Settlement Type: | Township |
| Pushpin Map: | South Dakota#USA |
| Pushpin Label: | Ada Township |
| Pushpin Map Caption: | Location within South Dakota##Location within the United States |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | South Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Perkins |
| Area Total Km2: | 92.3 |
| Area Land Km2: | 91.8 |
| Area Water Km2: | 0.5 |
| Area Total Sq Mi: | 35.6 |
| Area Land Sq Mi: | 35.4 |
| Area Water Sq Mi: | 0.2 |
| Population As Of: | 2000 |
| Population Total: | 23 |
| Population Density Km2: | 0.3 |
| Population Density Sq Mi: | 0.6 |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation M: | 757 |
| Elevation Ft: | 2484 |
| Coordinates: | 45.3439°N -102.4108°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 57620 |
| Area Code: | 605 |
| Blank Name: | FIPS code |
| Blank Info: | 46-00220[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1269024[2] |
Ada (ZIP code 57644) is a rural township in Perkins County, South Dakota, with a population of 557.