Seneca, IL ZIP Codes
2 ZIP codes serve Seneca, Illinois: 60450 and 61360. Together they are home to 24,393 residents in 10,104 households. That is more than the 2,450 people counted inside Seneca village limits, because these ZIP codes reach past its boundary. Median household income ranges from $81,777 in 60450 to $95,093 in 61360.
Seneca village limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 2,450 |
| Households | 907 |
| Median household income | $86,830 |
| Median home value | $227,500 |
| Median age | 35.5 |
| Median rent | $1,149 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 24,393 |
| Households (sum of ZIP codes) | 10,104 |
| Median household income, range across ZIP codes | $81,777 (60450) to $95,093 (61360) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $83,573 |
| Homeowners | 66.7% |
| Households with kids under 18 | 29.7% |
| Moved in the past year | 8.6% |
| Carrier routes in EDDM2GO's route library | 20 routes, 9,915 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in Seneca: 61360 ($95,093)
- Most residents: 60450 (20,783 people)
- Highest homeownership: 61360 (78.0% own their home)
- Most households with kids: 60450 (29.8% of households)
- Most new movers: 60450 (9.5% moved in last year)
- Youngest median age: 61360 (37.9 years)
- Highest median home value: 60450 ($275,500)
Every ZIP code in Seneca
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 60450 | Morris | 20,783 | 8,741 | $81,777 | $275,500 | 64.9% | 29.8% | 9.5% | 18 | 9,630 | 2% of its land |
| 61360 | Seneca | 3,610 | 1,363 | $95,093 | $258,200 | 78.0% | 29.4% | 3.5% | 2 | 1,071 | 7% of its land; mailing city |
A ZIP code is listed for Seneca when at least 10% of its land lies inside Seneca village limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Seneca. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Seneca.
Counties
- LaSalle County — 28 ZIP codes
- Grundy County — 12 ZIP codes
Nearby cities sharing these ZIP codes
Price a mailing to Seneca ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Seneca, IL?
- 60450 and 61360. A ZIP code is listed for Seneca when at least 10% of its land lies inside Seneca village limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Seneca.
- What is the population of Seneca, IL?
- The Census Bureau counts 2,450 residents inside Seneca village limits (ACS 2020–2024). The 2 ZIP codes that serve Seneca hold 24,393 residents in all.
- What is the median household income in Seneca, IL?
- $86,830 inside Seneca village limits, per the Census Bureau. Across its ZIP codes the medians run from $81,777 to $95,093.
- Which Seneca ZIP code has the highest median household income?
- 61360, at $95,093, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Seneca, IL?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 20 carrier routes reaching 9,915 residential and 786 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.