Dennison, IL ZIP code
The ZIP code for Dennison, Illinois is 62423. It is in Clark County.
- Population in these ZIPs
- 546
- Avg. median income
- $47,200population-weighted
- Typical home value
- $173,300population-weighted
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Dennison, IL ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 62423 | 546 | $47,179 | $173,300 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Dennison
Frequently asked questions
What is the ZIP code for Dennison, IL?
The ZIP code for Dennison, IL is 62423.
What county is Dennison, Illinois in?
Dennison ZIP codes are in Clark County.