🇺🇸 United States ZIP Code

STANDARD

81621

Basalt

ZIP Code 81621 is a standard zip code serving Basalt, Basalt, Colorado (CO), in Eagle County, United States. It has an estimated population of 5,914 with a median household income of $71,523. The area falls within the America/Denver timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Colorado (CO)
County: Eagle
City: Basalt
Timezone: America/Denver

Coordinates

Latitude: 39.353500
Longitude: -106.998800

Geographic Details

Land Area: 222.37 mi²
Water Area: 1.18 mi²
Population Density: 27.0 people per mi² (25th percentile)
Bounding Box: 39.484760°N, 39.231012°S, -106.509214°E, -107.155233°W

With 5,914 residents spread across 222.37 square miles, this area has a population density of 27.0 people per square mile.

Demographics

5,914

Population

60th percentile

$71,523

Median Income

85th percentile

$552,200

Median Home Value

95th percentile

222.37 mi²

Land Area

The median household income in 81621 is $71,523, and the median home value is $552,200. This places the area in the top 25% nationally for household income.

Housing

2,870

Total Units

2,376

Occupied Units

82.8%

Occupancy Rate

Similar ZIP Codes in Colorado

ZIP codes with similar median household income in Colorado.

80525

Fort Collins

$63,754

80549

Wellington

$72,481

80443

Frisco

$69,762

81435

Telluride

$69,432

81303

Durango

$63,684

80536

Livermore

$70,078

80648

Nunn

$64,375

80951

Colorado Springs

$73,214

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.