Longmont, CO ZIP Codes
3 ZIP codes serve Longmont, Colorado: 80504, 80501 and 80503. Together they are home to 143,444 residents in 58,175 households. That is more than the 99,406 people counted inside Longmont city limits, because these ZIP codes reach past its boundary. Median household income ranges from $80,911 in 80501 to $113,643 in 80504.
Longmont city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 99,406 |
| Households | 42,155 |
| Median household income | $90,671 |
| Median home value | $572,800 |
| Median age | 40.3 |
| Median rent | $1,816 |
All 3 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 143,444 |
| Households (sum of ZIP codes) | 58,175 |
| Median household income, range across ZIP codes | $80,911 (80501) to $113,643 (80504) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $102,978 |
| Homeowners | 69.0% |
| Households with kids under 18 | 27.5% |
| Moved in the past year | 15.2% |
| Carrier routes in EDDM2GO's route library | 102 routes, 61,009 homes (3 of 3 ZIP codes) |
Top facts
- Highest median household income in Longmont: 80504 ($113,643)
- Most residents: 80504 (63,451 people)
- Highest homeownership: 80504 (79.1% own their home)
- Most households with kids: 80504 (30.8% of households)
- Most new movers: 80501 (18.3% moved in last year)
- Youngest median age: 80501 (38.4 years)
- Highest median home value: 80503 ($755,500)
Every ZIP code in Longmont
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 80504 | Longmont | 63,451 | 24,077 | $113,643 | $591,700 | 79.1% | 30.8% | 11.5% | 39 | 26,804 | 11% of its land; mailing city |
| 80501 | Longmont | 44,147 | 18,945 | $80,911 | $488,800 | 58.5% | 25.0% | 18.3% | 37 | 21,940 | 84% of its land; mailing city |
| 80503 | Longmont | 35,846 | 15,153 | $113,620 | $755,500 | 66.1% | 25.5% | 18.1% | 26 | 15,943 | 9% of its land; mailing city |
A ZIP code is listed for Longmont when at least 10% of its land lies inside Longmont city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Longmont. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Longmont.
Counties
- Boulder County — 21 ZIP codes
- Weld County — 39 ZIP codes
Nearby cities sharing these ZIP codes
Price a mailing to Longmont ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Longmont, CO?
- 80504, 80501 and 80503. A ZIP code is listed for Longmont when at least 10% of its land lies inside Longmont city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Longmont.
- What is the population of Longmont, CO?
- The Census Bureau counts 99,406 residents inside Longmont city limits (ACS 2020–2024). The 3 ZIP codes that serve Longmont hold 143,444 residents in all.
- What is the median household income in Longmont, CO?
- $90,671 inside Longmont city limits, per the Census Bureau. Across its ZIP codes the medians run from $80,911 to $113,643.
- Which Longmont ZIP code has the highest median household income?
- 80504, at $113,643, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Longmont, CO?
- For the 3 of 3 ZIP codes in EDDM2GO's stored route library: 102 carrier routes reaching 61,009 residential and 3,588 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.