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US ZIP Code Profile

ZIP Code 33042
Summerland Key, Florida

ZIP code 33042 is in Summerland Key, located in Monroe County, Florida, within the Key West metro area. Its 2020 Census population was 6,841. The estimated median adjusted gross income per tax return is $73,641, and about 16% of filers report $200,000 or more.

2020 Population
6,841
Census ZCTA
County
Monroe
FIPS 12087
Median income (est.)
$73,641
IRS SOI 2022
Land Area
25.515 mi²
+ 89.555 mi² water

01Location & Geography

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

Primary CitySummerland Key, FL
CountyMonroe County (FIPS 12087)
StateFlorida (FIPS 12)
Metro Area (MSA)Key West, FL Micro Area (28580)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates24.67875, -81.49968
Land / Water Area25.515 mi² land · 89.555 mi² water

02Income & Economics

Distribution of the 3,450 individual tax returns filed in 33042 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
19.1%
$25K–$50K
18.3%
$50K–$75K
13.3%
$75K–$100K
10.4%
$100K–$200K
23.2%
$200K+
15.7%
The $200,000+ bracket accounts for 65% of 33042's total adjusted gross income, from 16% of returns — a concentration that drives the gap between the median ($73,641) 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 33042's IRS income metrics, 2020–2022.

Median income (2021→2022)
$73,641
▲ 1.3%
Filers earning $200K+
15.7%
▲ 0.0 pt
Total filers
3,450
▲ 7.8%
GET /zipc/v2/zipcodes/33042/soi?year=… $61K 2020 $73K 2021 $74K 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 33042 ZCTA.

2000
6,097
 
2010
5,829
▼ -4.4%
2020
6,841
▲ +17.4%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number118780
City AliasesBig Torch Key, Cudjoe Key, Little Torch Key, Middle Torch Key, Ramrod Key, Sugarloaf Key, Sugarloaf Shrs, Summerland Key, Upper Sugarloaf Key, Lower Sugarloaf Key, Sugarloaf, Ltl Torch Key, Mid Torch Key, Sugarlf Shrs, Summrlnd Key, Upr Sugarloaf, Lwr Sugarloaf

06Frequently Asked Questions

What county is ZIP code 33042 in?

ZIP code 33042 is in Monroe County, Florida (county FIPS code 12087).

What city is ZIP code 33042?

The primary USPS city for 33042 is Summerland Key, FL.

What metro area (MSA) is 33042 in?

33042 is part of the Key West, FL Micro Area (MSA code 28580).

What is the population of ZIP code 33042?

The 2020 Census population of 33042 was 6,841 residents.

What is the median income in ZIP code 33042?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 33042 is about $73,641, with around 16% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.