| Official Name: | Boundary City, Indiana |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Boundary City |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Jay |
| Subdivision Type3: | Township |
| Subdivision Name3: | Pike |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.3444°N -84.9219°W |
| Elevation Ft: | 1,017 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47371 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 431379 |
Boundary City is an unincorporated community in Pike Township, Jay County, Indiana, in the United States.
A post office was established as Boundary in 1852, and remained in operation until it was discontinued in 1904.[1] [2] The name of the community refers to the nearby boundary of an Indian treaty.[3]