US Gazetteer > Colorado Gazetteer > Colorado ZIP Codes > Longmont, CO 80503

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Preferred Name, USPS
Longmont, CO 80503
Not Acceptable, USPS
Niwot, CO 80503

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Weather forecast ZIP Code 80503

ZIP Code 80503 has segments in 2 Counties (Boulder, Larimer).

The 80503 ZIP Code is centered1 in Boulder County at latitude 40.153 and longitude -105.171 (Panoramio Photos). It is a standard type ZIP Code. Boulder County is in the Mountain Time Zone (UTC -7 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 80503 was 25,544 with 10,026 housing units; a land area land area of 92.08 sq. miles; a water area of 1.5 sq. miles; and a population density of 277.42 people per sq. mile for Census 2000. Demographic Profile

Longmont, CO 80503 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Dominion, CO (2.4 miles ESE)
Marnett, CO (2.4 miles ENE)
Hygiene, CO (2.4 miles NNW)
Niwot, CO (3.4 miles S)
Longmont, CO (3.9 miles ENE)
Altona, CO (6 miles WSW)
Gunbarrel, CO (6.1 miles S)
Morey, CO (6.1 miles NE)
Pleasant View Ridge, CO (6.6 miles ESE)
Gooding, CO (7.2 miles SE)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

Lazy Acres, CO (9.5 miles WSW)
Ninemile Corner, CO (10.1 miles SSE)
Pine Brook Hill, CO (10.4 miles SW)
Berts Corner, CO (11.3 miles NNE)
Seven Hills, CO (11.5 miles SW)
Seven Hills, CO (11.7 miles SW)
Tall Timber, CO (13.5 miles SW)
Maple Grove, CO (13.7 miles SSE)
Mountain Meadows, CO (14.2 miles SW)
Gold Run, CO (14.4 miles WSW)

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.

1 Keeping the above key concepts in mind, what we informally refer to as the "center" of a ZIP Code is most often actually the centroid of a polygon.