ZIP code 80503
Where is ZIP code 80503?
Longmont, Colorado
Boulder County · Standard ZIP code
ZIP code 80503 belongs to Longmont, Colorado in Boulder County. 80503 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Mountain Time zone and uses area codes 303, 720, 970 and 983. About 35,846 people live in the 80503 area, where the median household income is $113,620. The closest ZIP codes are 80502 (Longmont, 3.3 mi east), 80501 (Longmont, 3.6 mi northeast) and 80544 (Niwot, 3.6 mi south).
| ZIP code | 80503 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Longmont |
| Also accepted | Niwot |
| State | Colorado (CO) |
| County | Boulder County |
| Time zone | Mountain Time · now |
| Area codes | 303, 720, 970, 983 |
| Coordinates | 40.1559, -105.1624 map |
| 3-digit prefix | 805 |
Population and income in 80503
| Population | 35,846 · higher than 90% of Colorado ZIP codes |
|---|---|
| People per square mile | 391 · higher than 70% of Colorado ZIP codes |
| Median age | 44.8 years · higher than 64% of Colorado ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $113,620 · higher than 80% of Colorado ZIP codes |
| Income per person | $64,526 |
| Below the poverty line | 5.8% |
| Bachelor’s degree or higher | 60% of adults 25+ |
| Median home value | $755,500 · higher than 87% of Colorado ZIP codes |
| Median rent | $1,872 a month |
| Housing units | 15,737 |
| Households | 15,153 (2.35 people on average) |
| Owners / renters | 66% / 34% |
| Land area | 91.75 sq mi (plus 3.01 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 80503. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 80503
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 80502 | Longmont, CO | 3.3 mi E | PO Box only |
| 80501 | Longmont, CO | 3.6 mi NE | Standard |
| 80544 | Niwot, CO | 3.6 mi S | PO Box only |
| 80533 | Hygiene, CO | 4.1 mi NW | PO Box only |
| 80301 | Boulder, CO | 7.8 mi S | Standard |
| 80516 | Erie, CO | 8.3 mi SE | Standard |
| 80540 | Lyons, CO | 10.1 mi NW | Standard |
| 80542 | Mead, CO | 10.2 mi NE | Standard |
| 80304 | Boulder, CO | 10.2 mi SW | Standard |
| 80513 | Berthoud, CO | 10.4 mi N | Standard |
| 80309 | Boulder, CO | 11.3 mi SW | Unique |
| 80310 | Boulder, CO | 11.3 mi SW | Unique |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 80503 or measure the distance to another ZIP code.
How to address mail to 80503
123 MAIN ST
LONGMONT CO 80503
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts NIWOT as the city name for 80503. Adding the 4-digit ZIP+4 code (80503-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Longmont, CO
All Longmont ZIP codes with population and income →
Questions
- What city is ZIP code 80503?
- 80503 is a Longmont, Colorado ZIP code. Niwot is also accepted as the city name.
- What county is 80503 in?
- ZIP code 80503 is in Boulder County, Colorado.
- What time zone is ZIP code 80503 in?
- 80503 is in the Mountain Time zone (America/Denver).
- What area code is 80503?
- Phone numbers in ZIP code 80503 use area codes 303, 720, 970 and 983.
- What is the population of ZIP code 80503?
- About 35,846 people live in ZIP code 80503, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 80503?
- The median household income in 80503 is $113,620 a year, higher than 80% of Colorado ZIP codes.
- What ZIP codes are near 80503?
- The nearest ZIP codes to 80503 are 80502 (Longmont, 3.3 miles), 80501 (Longmont, 3.6 miles), 80544 (Niwot, 3.6 miles) and 80533 (Hygiene, 4.1 miles).