US > Colorado > Rio Grande County > South Fork, CO 81154

81154 ZIP Code Profile, Map, Data & Demographics

Related Place Profiles:
Alpine, CO | South Fork, CO
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ZIP Code 81154: Basic Data & USPS Preferred City Name

Preferred Name, USPS
South Fork, CO 81154

Not Acceptable, USPS
Alpine, CO 81154
Masonic Park, CO 81154
Wagon Wheel Gap, CO 81154

  • ZIP Code Type: STANDARD
  • County: Rio Grande County
  • Centroid: Latitude 37.672, Longitude -106.631
  • Time Zone: Mountain Time Zone (UTC -7 hours)
  • Observes DST: Yes

ZIP Code 81154 has segments in 2 Counties (Mineral, Rio Grande).

  • Businesses Addresses: 114
  • PO Box Addresses: 468
  • Residential Addresses: 774
    • Multi-Family Addresses: 48
    • Single Family Addresses: 726

The ZIP Code maps and database are updated 4 times per year.
Database updated: June 1, 2025, Maps updated: May 1, 2024.

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South Fork, CO 81154 Data & Demographics (As of July 1, 2025)

POPULATION

Total Population 1,337 (100%)
Population in Households 1,337 (100.0%)
Population in Families 1,003 (75.0%)
Population in Group Quarters1 0
Population Density 5
Diversity Index2 45
 
 

INCOME

Median Household Income $78,496
Average Household Income $91,649
% of Income for Mortgage4 28%
Per Capita Income $45,105
Wealth Index5 89
Socioeconomic Status Index6 High (68.9)
 

HOUSING

Total HU (Housing Units) 1,708 (100%)
Owner Occupied HU 508 (29.7%)
Renter Occupied HU 150 ( 8.8%)
Vacant Housing Units 1,050 (61.5%)
Median Home Value $350,000
Average Home Value $477,362
Housing Affordability Index3 88
 

HOUSEHOLDS

Total Households 658
Average Household Size 2.03
Family Households 376
Average Family Size 3.00
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

 2020-2025 2025-2030
Population 0.68% -0.85%
Households -0.20% -0.99%
Families   1.40%
Median Household Income   1.70%
Per Capita Income   1.68%
Owner Occupied HU   -0.48%

South Fork, CO 81154 - Peer Comparisons by Rank and Percentile

The table below compares 81154 to the other 524 ZIP Codes in Colorado by rank and percentile using July 1, 2025 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.

Variable Description Rank Percentile
Total Population # 317 40th
Population Density # 376 28th
Median Household Income # 312 41st
Housing Affordability Index # 437 83rd
Per Capita Income # 246 53rd
Diversity Index # 299 43rd

Additional comparisons and rankings can be made with a VERY EASY TO USE Colorado Census Data Comparison Tool.


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Rio Grande County


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