Dennison Illinois Profile
| Place Name | Dennison |
| Place Type | Unincorporated |
| ZIP Code(s) | 62423 |
| County | Clark County |
| Area Code(s) | 217 |
| Timezone | Central Daylight Time (CDT) |
| Population () | |
| US Congressional District(s) | Illinois 12th |
| State House Districts | 102 |
| State Senate Districts | 51 |