Residential delivery area · Florida
ZIP Code 33040: Key West, FL
ZIP code 33040 uses the postal name Key West, Florida and lies entirely in Monroe County (Census 2020 ZIP-county file). About 35,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $86,586 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Key West (29%), Big Coppitt Key (7%) and Stock Island (5%); 59% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Key West · its only residential ZIP
- County
- Monroe County
- Census places
- Key West (29%); Big Coppitt Key (7%) census-designated place; Stock Island (5%) census-designated place
- Micro area
- Key West-Key Largo, FL
- House district
- FL-28 119th Congress
- State
- Florida
- Time zone
- Eastern
- Land area
- 17.7 sq mi · 1,999 people per sq mi
Where is ZIP code 33040?
33040 centers on 24.545°, -81.922° and covers 17.7 square miles of land plus 121.5 of water. It borders 1 ZIP code: 33042.
The map draws ZIP code areas only. For the streets inside 33040, 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 33040 compare with the rest of Monroe County?
| Measure | 33040 | In Monroe County | In FL |
|---|---|---|---|
| People (ACS 2020-2024) | 35,429 | 1st of 11 | 208th of 1,013 |
| Median household income | $87k | 3rd of 6 | 244th of 819 |
| Median home value | $819k | 3rd of 8 | 33rd of 833 |
Its median household income is higher than in 70% of U.S. residential ZIP codes, and it is denser than 85% 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 33040?
The 2020 Census counted 35,958 people in 33040; the ACS, which samples households over 2020-2024, estimates 35,429. Between the 2010 and 2020 censuses its population grew 9.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 35,429
- 2020 Census count
- 35,958+9.3% since 2010 (32,891)
- Households
- 14,574
- Median age
- 43.8
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 33040?
Of the 35,429 people the ACS estimates in 33040, 16.2% are under 18 and 19.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (55.1%), then Hispanic or Latino (25.4%).
- Under 1816.2%
- 18 to 6463.9%
- 65 and older19.8%
- White, not Hispanic55.1%
- Hispanic or Latino25.4%
- Black, not Hispanic13.2%
- Other or two or more4.3%
- Asian, not Hispanic2.0%
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 33040 earn?
Median household income is $86,586 (ACS 2020-2024), the 3rd highest of the 6 ranked ZIP codes in Monroe County. It is not measurably different from 2015-2019 ($85,524 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $86,586±$8,797
- Income per person
- $57,545
- Below the poverty line
- 10.0%
- Unemployed (of the labor force)
- 2.7%
- Adults 25+ with a bachelor's degree
- 38.2%
- Adjusted gross income per tax return, 2022
- $131,48319,040 returns; wages 46% 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 33040?
FHFA's house price index for 33040, built from repeat sales and appraisals of the same homes, rose 106% from 2015 to 2025 and rose 54% from 2020 to 2025, and moved +7.6% in 2025.
- Median home value (owners' estimate)
- $819,400
- Median gross rent
- $2,167
- Homes owned by their occupants
- 50.2%
- Housing units
- 19,404
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 33040?
1,787 business establishments had a location in this ZIP code in 2023, 149 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services312
- Retail trade311
- Professional, scientific, and technical services185
- Real estate and rental and leasing175
- Construction136
- Other services (except public administration)127
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 33040?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 33042 | Summerland Key | 6,441 | $103k | 27.6 mi |
| 33043 | Big Pine Key | 4,298 | $111k | 42.4 mi (near) |
| 33051 | Key Colony Beach | 511 | $94k | 57.9 mi (near) |
| 33050 | Marathon | 10,561 | $95k | 60.4 mi (near) |
| 33001 | Long Key | 250 | – | 73.1 mi (near) |
| 33036 | Islamorada | 3,777 | $86k | 80.6 mi (near) |
| 33070 | Tavernier | 5,768 | $75k | 93.1 mi (near) |
| 34138 | Chokoloskee | 808 | $99k | 94.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Key West?
2 more ZIP codes carry the postal name Key West, FL without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for them.
| ZIP | County |
|---|---|
| 33041 | Monroe County |
| 33045 | Monroe County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.