| Official Name: | Allenwood |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Pennsylvania#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Union |
| Subdivision Type3: | Township |
| Subdivision Name3: | Gregg |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.52 |
| Area Land Km2: | 1.52 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.59 |
| Area Land Sq Mi: | 0.59 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 334 |
| Population Density Km2: | 219.47 |
| Population Density Sq Mi: | 568.03 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 495 |
| Coordinates: | 41.1075°N -76.8983°W |
| Area Code: | 570 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1168202 |
Allenwood (also called Union Town) is a census-designated place in Gregg Township, Union County, Pennsylvania, United States. As of the 2010 census, its population was 321.[2] Federal Correctional Complex, Allenwood is located here.