Get API Key →
US ZIP Code Profile

ZIP Code 33040
Key West, Florida

ZIP code 33040 is in Key West, located in Monroe County, Florida, within the Key West metro area. Its 2020 Census population was 35,958. The estimated median adjusted gross income per tax return is $47,809, and about 9% of filers report $200,000 or more.

2020 Population
35,958
Census ZCTA
County
Monroe
FIPS 12087
Median income (est.)
$47,809
IRS SOI 2022
Land Area
18.515 mi²
+ 127.06 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityKey West, FL
CountyMonroe County (FIPS 12087)
StateFlorida (FIPS 12)
Metro Area (MSA)Key West, FL Micro Area (28580)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates24.560907, -81.88948
Land / Water Area18.515 mi² land · 127.06 mi² water

02Income & Economics

Distribution of the 19,040 individual tax returns filed in 33040 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
25.9%
$25K–$50K
26.4%
$50K–$75K
15.7%
$75K–$100K
8.7%
$100K–$200K
14.0%
$200K+
9.3%
The $200,000+ bracket accounts for 62% of 33040's total adjusted gross income, from 9% of returns — a concentration that drives the gap between the median ($47,809) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 33040's IRS income metrics, 2020–2022.

Median income (2021→2022)
$47,809
▲ 3.5%
Filers earning $200K+
9.3%
▲ 0.5 pt
Total filers
19,040
▲ 5.7%
GET /zipc/v2/zipcodes/33040/soi?year=… $40K 2020 $46K 2021 $48K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 33040 ZCTA.

2000
34,230
 
2010
32,891
▼ -3.9%
2020
35,958
▲ +9.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number114620
City AliasesE Rockland Key, East Rockland Key, Fort Jefferson National Mon, Key West, Key West Naval Air Station, Munson Island, Raccoon Key, Stock Island, Key West Nas, E Rockland Ky

06Frequently Asked Questions

What county is ZIP code 33040 in?

ZIP code 33040 is in Monroe County, Florida (county FIPS code 12087).

What city is ZIP code 33040?

The primary USPS city for 33040 is Key West, FL.

What metro area (MSA) is 33040 in?

33040 is part of the Key West, FL Micro Area (MSA code 28580).

What is the population of ZIP code 33040?

The 2020 Census population of 33040 was 35,958 residents.

What is the median income in ZIP code 33040?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 33040 is about $47,809, with around 9% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.