Residential delivery area · Florida
ZIP Code 33042: Summerland Key, FL
ZIP code 33042 uses the postal name Summerland Key, Florida and lies entirely in Monroe County (Census 2020 ZIP-county file). About 6,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $103,041 (Census Bureau, ACS 2020-2024). By Census place, 19% of its land lies in Cudjoe Key (a census-designated place); 81% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Summerland Key · its only residential ZIP
- County
- Monroe County
- Census places
- Cudjoe Key census-designated place
- Micro area
- Key West-Key Largo, FL
- House district
- FL-28 119th Congress
- State
- Florida
- Time zone
- Eastern
- Land area
- 27.6 sq mi · 233 people per sq mi
Where is ZIP code 33042?
33042 centers on 24.665°, -81.503° and covers 27.6 square miles of land plus 95.8 of water. It borders 2 ZIP codes: 33043, 33040.
The map draws ZIP code areas only. For the streets inside 33042, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 33042 compare with the rest of Monroe County?
| Measure | 33042 | In Monroe County | In FL |
|---|---|---|---|
| People (ACS 2020-2024) | 6,441 | 5th of 11 | 769th of 1,013 |
| Median household income | $103k | 1st of 6 | 128th of 819 |
| Median home value | $857k | 2nd of 8 | 27th of 833 |
Its median household income is higher than in 83% of U.S. residential ZIP codes, and it is denser than 64% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 33042?
The 2020 Census counted 6,841 people in 33042; the ACS, which samples households over 2020-2024, estimates 6,441. Between the 2010 and 2020 censuses its population grew 17.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,441±651 (90% margin)
- 2020 Census count
- 6,841+17.4% since 2010 (5,829)
- Households
- 2,820
- Median age
- 52.5
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 33042?
Of the 6,441 people the ACS estimates in 33042, 15.2% are under 18 and 29.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (80.5%), then Hispanic or Latino (14.1%).
- Under 1815.2%
- 18 to 6455.3%
- 65 and older29.6%
- White, not Hispanic80.5%
- Hispanic or Latino14.1%
- Other or two or more4.9%
- Asian, not Hispanic0.3%
- Black, not Hispanic0.1%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 33042 earn?
Median household income is $103,041 (ACS 2020-2024), the highest of the 6 ranked ZIP codes in Monroe County. It is not measurably different from 2015-2019 ($106,428 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $103,041±$17,444
- Income per person
- $63,808
- Below the poverty line
- 8.4%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 46.7%
- Adjusted gross income per tax return, 2022
- $170,7993,450 returns; wages 39% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 33042?
FHFA's house price index for 33042, built from repeat sales and appraisals of the same homes, rose 109% from 2015 to 2025 and rose 58% from 2020 to 2025, and moved +2.5% in 2025.
- Median home value (owners' estimate)
- $856,500
- Median gross rent
- $2,271
- Homes owned by their occupants
- 82.7%
- Housing units
- 4,757
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 33042?
215 business establishments had a location in this ZIP code in 2023, 21 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction36
- Professional, scientific, and technical services34
- Real estate and rental and leasing28
- Administrative and support and waste management and remediation services17
- Accommodation and food services17
- Retail trade15
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 33042?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 33043 | Big Pine Key | 4,298 | $111k | 15.2 mi |
| 33040 | Key West | 35,429 | $87k | 27.6 mi |
| 33051 | Key Colony Beach | 511 | $94k | 30.5 mi (near) |
| 33050 | Marathon | 10,561 | $95k | 32.9 mi (near) |
| 33001 | Long Key | 250 | – | 45.6 mi (near) |
| 33036 | Islamorada | 3,777 | $86k | 53.0 mi (near) |
| 33070 | Tavernier | 5,768 | $75k | 65.6 mi (near) |
| 33034 | Homestead | 23,823 | $47k | 72.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.