Clark County, IL ZIP Codes
7 ZIP codes cover all or part of Clark County, Illinois: 62441, 62420, 62442, 62474, 62423, 62477 and 62478. The Census Bureau counts 15,266 residents in the county, with a median household income of $72,927 and a median home value of $132,400. Median household income ranges from $65,771 in 62420 to $80,738 in 62441. Its largest communities include Marshall, Casey, Martinsville, Westfield and West Union.
Clark County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 15,266 |
| Households | 6,555 |
| Median household income | $72,927 |
| Median home value | $132,400 |
| Median age | 42.6 |
| Median rent | $861 |
All 7 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 16,004 |
| Households (sum of ZIP codes) | 6,870 |
| Median household income, range across ZIP codes | $65,771 (62420) to $80,738 (62441) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $74,168 |
| Homeowners | 80.9% |
| Households with kids under 18 | 30.2% |
| Moved in the past year | 9.4% |
| Carrier routes in EDDM2GO's route library | 11 routes, 3,090 homes (4 of 7 ZIP codes) |
Top facts
- Highest median household income in Clark County: 62441 ($80,738)
- Most residents: 62441 (7,003 people)
- Highest homeownership: 62420 (84.2% own their home)
- Most households with kids: 62441 (32.8% of households)
- Most new movers: 62441 (14.5% moved in last year)
- Youngest median age: 62420 (39.4 years)
- Highest median home value: 62441 ($155,600)
Every ZIP code in Clark County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 62441 | Marshall | 7,003 | 3,037 | $80,738 | $155,600 | 75.2% | 32.8% | 14.5% | — | — | 96% of its land |
| 62420 | Casey | 4,299 | 1,853 | $65,771 | $140,400 | 84.2% | 29.4% | 4.2% | 5 | 1,944 | 57% of its land |
| 62442 | Martinsville | 2,671 | 1,131 | $70,284 | $87,200 | 83.1% | 28.0% | 7.4% | 3 | 941 | 98% of its land |
| 62474 | Westfield | 626 | 307 | $67,083 | $88,200 | 98.0% | 13.4% | 3.4% | 1 | 223 | 64% of its land |
| 62423 | Clark County | 546 | 222 | $47,179 | $173,300 | 87.8% | 39.2% | 0.0% | — | — | 66% of its land |
| 62477 | West Union | 526 | 205 | $88,646 | $110,900 | 87.8% | 25.9% | 12.9% | — | — | 100% of its land |
| 62478 | West York | 333 | 115 | $98,750 | $131,000 | 87.0% | 33.0% | 7.5% | 2 | 136 | 54% of its land |
A ZIP code is listed for Clark County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Marshall — 4,040 residents · 1 ZIP code
- Casey — 2,239 residents · 1 ZIP code
- Martinsville — 1,187 residents · 1 ZIP code
- Westfield — 415 residents · 1 ZIP code
- West Union — 140 residents · 1 ZIP code
- West York — 83 residents · 1 ZIP code
Price a mailing to Clark County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Clark County, IL?
- 62441, 62420, 62442, 62474, 62423, 62477 and 62478. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Clark County?
- 15,266 residents in 6,555 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Clark County?
- $72,927 for the county as a whole. Its ZIP codes range from $65,771 (62420) to $80,738 (62441).
- Which Clark County ZIP code has the highest median household income?
- 62441, at $80,738, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Clark County?
- For the 4 of 7 ZIP codes in EDDM2GO's stored route library: 11 carrier routes reaching 3,090 residential and 154 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.