Seneca, KS ZIP Codes
One ZIP code serves Seneca, Kansas: 66538. Together they are home to 3,602 residents in 1,361 households. That is more than the 2,090 people counted inside Seneca city limits, because these ZIP codes reach past its boundary.
Seneca city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 2,090 |
| Households | 869 |
| Median household income | $76,750 |
| Median home value | $235,100 |
| Median age | 51.8 |
| Median rent | $602 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 3,602 |
| Households (sum of ZIP codes) | 1,361 |
| Median household income, range across ZIP codes | $78,981 (66538) to $78,981 (66538) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $78,981 |
| Homeowners | 81.0% |
| Households with kids under 18 | 29.4% |
| Moved in the past year | 7.7% |
| Carrier routes in EDDM2GO's route library | 5 routes, 1,459 homes (1 of 1 ZIP codes) |
Every ZIP code in Seneca
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 66538 | Seneca | 3,602 | 1,361 | $78,981 | $299,300 | 81.0% | 29.4% | 7.7% | 5 | 1,602 | 1% of its land; mailing city |
A ZIP code is listed for Seneca when at least 10% of its land lies inside Seneca city 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
- Nemaha County — 14 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, KS?
- 66538. A ZIP code is listed for Seneca when at least 10% of its land lies inside Seneca city 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, KS?
- The Census Bureau counts 2,090 residents inside Seneca city limits (ACS 2020–2024). The 1 ZIP code that serve Seneca hold 3,602 residents in all.
- What is the median household income in Seneca, KS?
- $76,750 inside Seneca city limits, per the Census Bureau. Across its ZIP codes the medians run from $78,981 to $78,981.
- How many carrier routes and mailboxes are in Seneca, KS?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 5 carrier routes reaching 1,459 residential and 144 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.