Monticello, IL ZIP Codes
One ZIP code serves Monticello, Illinois: 61856. Together they are home to 8,226 residents in 3,400 households. That is more than the 6,304 people counted inside Monticello city limits, because these ZIP codes reach past its boundary.
Monticello city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 6,304 |
| Households | 2,675 |
| Median household income | $99,449 |
| Median home value | $210,500 |
| Median age | 43.8 |
| Median rent | $1,379 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 8,226 |
| Households (sum of ZIP codes) | 3,400 |
| Median household income, range across ZIP codes | $103,559 (61856) to $103,559 (61856) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $103,559 |
| Homeowners | 85.7% |
| Households with kids under 18 | 26.2% |
| Moved in the past year | 8.7% |
| Carrier routes in EDDM2GO's route library | 8 routes, 3,416 homes (1 of 1 ZIP codes) |
Every ZIP code in Monticello
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 61856 | Monticello | 8,226 | 3,400 | $103,559 | $230,900 | 85.7% | 26.2% | 8.7% | 8 | 3,667 | 4% of its land; mailing city |
A ZIP code is listed for Monticello when at least 10% of its land lies inside Monticello city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Monticello. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Monticello.
Counties
- Piatt County — 13 ZIP codes
Price a mailing to Monticello ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Monticello, IL?
- 61856. A ZIP code is listed for Monticello when at least 10% of its land lies inside Monticello city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Monticello.
- What is the population of Monticello, IL?
- The Census Bureau counts 6,304 residents inside Monticello city limits (ACS 2020–2024). The 1 ZIP code that serve Monticello hold 8,226 residents in all.
- What is the median household income in Monticello, IL?
- $99,449 inside Monticello city limits, per the Census Bureau. Across its ZIP codes the medians run from $103,559 to $103,559.
- How many carrier routes and mailboxes are in Monticello, IL?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 8 carrier routes reaching 3,416 residential and 251 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.