Monroe County, FL ZIP codes
There are 12 ZIP codes in Monroe County, FL, in 10 towns, from 33001 to 33070. The largest are 33040 (Key West), 33037 (Key Largo) and 33050 (Marathon). 2 more cross into it from neighbouring counties: 33034 and 34141.
The county seat is Key West.
- ZIP codes
- 12
- Partly in it
- 2 more
- Towns
- 10
- County seat
- Key West
- County FIPS
12087- State
- Florida
- Population
- 81,860
- Median household income
- $87,738
- Land area
- 983 sq mi
- Metro area
- Key West-Key Largo
Monroe County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Monroe County
These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Monroe County.
- 33034 Homestead · mostly in Miami-Dade County
- 34141 Ochopee · mostly in Collier County
Map of Monroe County ZIP codes
The ZIP codes of Monroe County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Monroe County in numbers
About 81,860 people live in Monroe County, in 34,405 households, the 39th most populous of Florida's 67 counties. The median household income is $87,738 a year, 18% above the Florida median of $74,568 (US: $80,734). The median owner-occupied home is valued at $780,600 (2.2 times the Florida median), and median gross rent is $1,999 a month. The median age is 49.2; 38.6% of adults 25 and over hold a bachelor's degree or higher (34.1% across Florida); the average commute takes 20 minutes.
| Population | 81,860 |
|---|---|
| Households | 34,405 |
| Median age | 49.2 |
| Median household income | $87,738 |
| Median home value | $780,600 |
| Median gross rent | $1,999 |
| Bachelor's degree or higher | 38.6% |
| Mean commute | 19.5 min |
| Population density | 83 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Monroe County
| Town | ZIP codes | Population |
|---|---|---|
| Key West | 3 | 25,720 |
| Key Largo | 1 | 13,026 |
| Marathon | 1 | 9,914 |
| Summerland Key | 1 | 6,441 |
| Big Pine Key | 1 | 4,258 |
| Islamorada | 1 | 3,777 |
| Tavernier | 1 | 2,413 |
| Key Colony Beach | 1 | 511 |
| Long Key | 1 | 250 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Monroe County.
Not sure you are in Monroe County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Monroe County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
33001 | Long Key , FL | Standard | 250 | — | $703,100 |
33036 | Islamorada , FL | Standard | 3,777 | $86,032 | $1,017,400 |
33037 | Key Largo , FL | Standard | 14,770 | $86,533 | $683,000 |
33040 | Key West , FL | Standard | 35,429 | $86,586 | $819,400 |
33041 | Key West , FL | No street area | — | — | — |
33042 | Summerland Key , FL | Standard | 6,441 | $103,041 | $856,500 |
33043 | Big Pine Key , FL | Standard | 4,298 | $110,491 | $638,000 |
33045 | Key West , FL | No street area | — | — | — |
33050 | Marathon , FL | Standard | 10,561 | $94,898 | $747,300 |
33051 | Key Colony Beach , FL | Standard | 511 | $94,231 | $919,800 |
33052 | Marathon Shores , FL | No street area | — | — | — |
33070 | Tavernier , FL | Standard | 5,768 | $75,436 | $732,800 |
Cite this page
zipcodes.pro. “Monroe County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/fl/county/monroe
Underlying data is public domain or openly licensed — sources, vintages and licences.