ZIP Code 81101 has segments in 2 Counties (Alamosa, Conejos).
Businesses Addresses: 899
PO Box Addresses: 750
Residential Addresses: 6,645
Multi-Family Addresses: 73
Single Family Addresses: 6,572
The ZIP Code maps and database are updated 4 times per year. Database updated: March 1, 2026, Maps updated: May 1, 2024.
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Alamosa, CO 81101 Data & Demographics
Source: 2020-2024 American Community Survey 5-Year Estimates
POPULATION
Total Population
15,550 (100%)
Population Density
42 per sq mi
Diversity Index1
56
INCOME
Median Household Income
$54,844
Per Capita Income
$29,490
Median Home Value
$240,400
HOUSING
Total HU (Housing Units)
6,812 (100%)
Owner Occupied HU
3,443 (50.5%)
Renter Occupied HU
2,849 (41.8%)
Vacant Housing Units
520 (7.6%)
HOUSEHOLDS
Total Households
6,292
Average Household Size
2.32
Family Households
3,742 (59.5%)
NOTES
The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).
Alamosa, CO 81101 - Peer Comparisons by Rank and Percentile
The table below compares 81101 to the other 33,772 ZIP Codes in the United States by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.
