| Cairo, Indiana | |
| Settlement Type: | Unincorporated community |
| Mapsize: | 150px |
| Pushpin Map: | USA Indiana Tippecanoe County |
| Pushpin Label: | Cairo |
| Pushpin Map Caption: | Location in Tippecanoe County |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Tippecanoe |
| Subdivision Type3: | Township |
| Subdivision Name3: | Tippecanoe |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 689 |
| Coordinates: | 40.5408°N -86.9247°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 47906 |
| Area Code: | 765 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 431946 |
Cairo is an unincorporated community in Tippecanoe Township, Tippecanoe County, in the U.S. state of Indiana.
The community is part of the Lafayette, Indiana Metropolitan Statistical Area.
In 1952 the US Air Force commissioned the construction of an observation tower in Cairo, which was built by local volunteers. Manned twenty-four hours a day, observers kept watch for enemy aircraft until being the advent of the national radar system.