Niwot, CO ZIP Codes
2 ZIP codes serve Niwot, Colorado: 80503 and 80544. Together they are home to 35,846 residents in 15,153 households. That is more than the 3,447 people counted inside Niwot Census-designated place, because these ZIP codes reach past its boundary.
Niwot Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 3,447 |
| Households | 1,505 |
| Median household income | $146,492 |
| Median home value | $995,700 |
| Median age | 54.6 |
| Median rent | $1,414 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 35,846 |
| Households (sum of ZIP codes) | 15,153 |
| Median household income, range across ZIP codes | $113,620 (80503) to $113,620 (80503) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $113,620 |
| Homeowners | 66.1% |
| Households with kids under 18 | 25.5% |
| Moved in the past year | 18.1% |
| Carrier routes in EDDM2GO's route library | 26 routes, 15,573 homes (1 of 2 ZIP codes) |
Every ZIP code in Niwot
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 80503 | Longmont | 35,846 | 15,153 | $113,620 | $755,500 | 66.1% | 25.5% | 18.1% | 26 | 15,943 | 4% of its land |
| 80544 | Niwot | 0 | 0 | — | — | — | — | — | — | — | 100% of its land; mailing city |
A ZIP code is listed for Niwot when at least 10% of its land lies inside the Niwot Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Niwot. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Niwot.
Counties
- Boulder County — 21 ZIP codes
Nearby cities sharing these ZIP codes
Price a mailing to Niwot ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Niwot, CO?
- 80503 and 80544. A ZIP code is listed for Niwot when at least 10% of its land lies inside the Niwot Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Niwot.
- What is the population of Niwot, CO?
- The Census Bureau counts 3,447 residents inside Niwot Census-designated place (ACS 2020–2024). The 2 ZIP codes that serve Niwot hold 35,846 residents in all.
- What is the median household income in Niwot, CO?
- $146,492 inside Niwot Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $113,620 to $113,620.
- How many carrier routes and mailboxes are in Niwot, CO?
- For the 1 of 2 ZIP codes in EDDM2GO's stored route library: 26 carrier routes reaching 15,573 residential and 369 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.