| Official Name: | Harrison Lake, Indiana |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Harrison Lake |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Bartholomew |
| Subdivision Type3: | Township |
| Subdivision Name3: | Harrison |
| Area Footnotes: | [1] |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 0.42 |
| Area Land Sq Mi: | 0.27 |
| Area Water Sq Mi: | 0.16 |
| Population As Of: | 2020 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 719 |
| Coordinates: | 39.1856°N -86.0256°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 47201 (Columbus) |
| Area Code: | 812 & 930 |
| Blank Name: | FIPS code |
| Blank Info: | 18-32098 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2830312 |
Harrison Lake is an unincorporated community and census-designated place (CDP) in Bartholomew County, Indiana, United States. It is part of the Columbus, Indiana, metropolitan statistical area.
The community is in western Bartholomew County, built around two reservoirs on Denios Creek: North Harrison Lake and South Harrison Lake. A third reservoir, Tamerix Lake, lies to the south, outside the CDP. Columbus, the county seat, is 7miles to the east.
According to the United States Census Bureau, the CDP has a total area of 0.42sqmi, of which 0.27sqmi are land and 0.16sqmi, or 36.97%, are water.[1] Via Denios Creek, the Harrison Lakes drain southeast to the East Fork of the White River.