🇺🇸 United States ZIP Code

STANDARD

81154

South Fork

ZIP Code 81154 is a standard zip code serving South Fork, South Fork, Colorado (CO), in Rio Grande County, United States. It has an estimated population of 1,148 with a median household income of $36,696. The area falls within the America/Denver timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Colorado (CO)
County: Rio Grande
City: South Fork
Timezone: America/Denver

Coordinates

Latitude: 37.672500
Longitude: -106.612500

Geographic Details

Land Area: 267.02 mi²
Water Area: 0.13 mi²
Population Density: 4.0 people per mi² (5th percentile)
Bounding Box: 37.812158°N, 37.402166°S, -106.493085°E, -106.838617°W

With 1,148 residents spread across 267.02 square miles, this area has a population density of 4.0 people per square mile.

Demographics

1,148

Population

30th percentile

$36,696

Median Income

20th percentile

$223,100

Median Home Value

75th percentile

267.02 mi²

Land Area

The median household income in 81154 is $36,696, and the median home value is $223,100. This is below the national average for household income.

Housing

1,707

Total Units

542

Occupied Units

31.8%

Occupancy Rate

Similar ZIP Codes in Colorado

ZIP codes with similar median household income in Colorado.

80916

Colorado Springs

$41,131

81321

Cortez

$41,371

81415

Crawford

$37,917

80734

Holyoke

$38,889

80260

Denver

$41,185

80223

Denver

$38,945

80813

Cripple Creek

$37,604

80247

Denver

$36,462

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.