| Locust Gap | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Caption: | Location within the state of Pennsylvania |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Northumberland |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 9.18 |
| Area Land Sq Mi: | 9.18 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2000 |
| Population Total: | 388 |
| Population Density Km2: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1191 |
| Coordinates: | 40.7717°N -76.4417°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 17840[1] |
| Area Code: | 570 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1179772[2] |
Locust Gap is an unincorporated community in Northumberland County, Pennsylvania, United States. It is located approximately two miles southwest of Mount Carmel.
Locust Gap is located at an elevation of 1191 feet.