US Gazetteer > Colorado Gazetteer > Colorado ZIP Codes > Alamosa, CO 81101

City/Town Names Most Popular Resources Current Weather & 7-Day Forecast 
Preferred Name, USPS
Alamosa, CO 81101
Acceptable Alternative
Great Sand Dunes National Mo, CO 81101
Sand Dunes Mo, CO 81101
Not Acceptable, USPS
Carmel, CO 81101
East Alamosa, CO 81101
Estrella, CO 81101
Henry, CO 81101
Stanley, CO 81101
Washington, CO 81101
Waverly, CO 81101

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Weather forecast ZIP Code 81101

ZIP Code 81101 has segments in 2 Counties (Alamosa, Conejos).

The 81101 ZIP Code is centered1 in Alamosa County at latitude 37.473 and longitude -105.867 (Panoramio Photos). It is a standard type ZIP Code. Alamosa County is in the Mountain Time Zone (UTC -7 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 81101 was 14,100 with 5,711 housing units; a land area land area of 367.65 sq. miles; a water area of 0.69 sq. miles; and a population density of 38.35 people per sq. mile for Census 2000. Demographic Profile

Alamosa, CO 81101 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Alamosa, CO (< 0.1 mile)
La Fruto, CO (4.3 miles SSW)
Henry, CO (5.6 miles SSW)
Hartner, CO (6.1 miles SSW)
Estrella, CO (8.1 miles SSW)
Waverly, CO (8.2 miles WSW)
Parma, CO (10.4 miles WNW)
Mosca, CO (12.2 miles N)
Morgan, CO (13.1 miles SW)
Zinzer, CO (13.9 miles WNW)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

No additional populated places within a 20 miles radius found.

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.