🇺🇸 United States ZIP Code

STANDARD

33040

Key West

ZIP Code 33040 is a standard zip code serving Key West, Key West, Florida (FL), in Monroe County, United States. It has an estimated population of 32,891 with a median household income of $53,050. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Florida (FL)
County: Monroe
City: Key West
Timezone: America/New_York

Coordinates

Latitude: 24.555200
Longitude: -81.781600

Geographic Details

Land Area: 18.49 mi²
Water Area: 127.08 mi²
Population Density: 1779.0 people per mi² (80th percentile)
Bounding Box: 24.642939°N, 24.517481°S, -81.583884°E, -82.875200°W

With 32,891 residents spread across 18.49 square miles, this area has a population density of 1779.0 people per square mile.

Demographics

32,891

Population

90th percentile

$53,050

Median Income

60th percentile

$388,600

Median Home Value

90th percentile

18.49 mi²

Land Area

The median household income in 33040 is $53,050, and the median home value is $388,600.

Housing

18,081

Total Units

14,160

Occupied Units

78.3%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Key West, FL.

33041

Key West

33045

Key West

Similar ZIP Codes in Florida

ZIP codes with similar median household income in Florida.

32907

Palm Bay

$49,009

33166

Miami

$50,180

34429

Crystal River

$47,942

33193

Miami

$50,329

32666

Melrose

$47,431

33908

Fort Myers

$52,268

33549

Lutz

$55,614

33070

Tavernier

$49,239

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.