| Official Name: | Lake Santee, Indiana |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Indiana |
| Pushpin Label: | Lake Santee |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Decatur, Franklin |
| Subdivision Type3: | Township |
| Subdivision Name3: | Fugit, Salt Creek |
| Area Total Km2: | 7.30 |
| Area Land Km2: | 6.38 |
| Area Water Km2: | 0.92 |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 2.82 |
| Area Land Sq Mi: | 2.46 |
| Area Water Sq Mi: | 0.36 |
| Population Density Sq Mi: | 360.94 |
| Population Density Km2: | 139.34 |
| Population As Of: | 2020 |
| Population Total: | 889 |
| Coordinates: | 39.4078°N -85.3067°W |
| Elevation Ft: | 994 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47240 |
| Blank Name: | FIPS code |
| Blank Info: | 18-41444[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2587021 |
| Unit Pref: | Imperial |
Lake Santee is an unincorporated town and census-designated place in Decatur and Franklin counties, Indiana, United States. As of the 2010 census, it had a population of 820.[3]
Lake Santee was built up in the 1960s as a housing development centered on a reservoir of the same name.[4]
Lake Santee is located in southeastern Indiana. It is situated 13miles northeast of Greensburg and 12miles northwest of Batesville.
According to the U.S. Census Bureau, the CDP has a total area of 7.3sqkm, of which 6.4sqkm is land and 0.9sqkm, or 12.60%, is water. The water area consists entirely of Lake Santee, the reservoir.[5]