| Official Name: | Allen Center, Ohio |
| Settlement Type: | Unincorporated community |
| Mapsize: | 250px |
| Pushpin Map: | Ohio |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Union |
| Unit Pref: | Imperial |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1053 |
| Coordinates: | 40.2417°N -83.4781°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 43040 |
| Area Codes: | 937, 326 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1060818 |
Allen Center is an unincorporated community in Allen Township, Union County, Ohio, United States. It is located at the intersection of Allen Center and Bear Swamp roads.[1]
Allen Center was laid out around 1849.[2] A post office was established at Allen Center in 1851, and remained in operation until 1863.[3]