33042 ZIP Code, Summerland Key, FL
33042 is a ZIP code in Summerland Key, Florida in Monroe County. It covers 28 square miles of land. The closest ZIP codes are 33043. 6,441 people live here in 2,820 households. With about 233 people per square mile it is lightly settled, and most homes are owner-occupied (83%). Median household income is $103,041, above the Florida median of $74,568; the median age is 52.5, older than most ZIP codes.
Quick facts
- Mailing city: Summerland Key, FL
- County: Monroe County
- Land area: 28 sq mi
- Population: 6,441
- Median household income: $103,041
- Carrier routes: 8 (3,782 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 6,441 |
| Households | 2,820 |
| Median household income | $103,041 |
| Income per person | $63,808 |
| Median age | 52.5 |
| Homeowners | 82.7% |
| Median home value | $856,500 |
| Median rent | $2,271 |
| Bachelor's degree or higher | 46.7% |
| Average commute (minutes) | 29.6 |
| Households with kids under 18 | 20.4% |
| Moved in the past year | 14.9% |
| Below the poverty line | 8.4% |
| Broadband internet | 97.1% |
| Speak a non-English language at home | 11.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 5.0% |
| $10–15K | 0.5% |
| $15–25K | 3.9% |
| $25–35K | 2.7% |
| $35–50K | 10.1% |
| $50–75K | 13.7% |
| $75–100K | 13.5% |
| $100–150K | 20.1% |
| $150–200K | 13.9% |
| $200K+ | 16.7% |
Age
| % of all residents | Value |
|---|---|
| <10 | 6.9% |
| 10–19 | 9.3% |
| 20–24 | 3.2% |
| 25–34 | 10.3% |
| 35–44 | 10.2% |
| 45–54 | 14.4% |
| 55–64 | 16.2% |
| 65–74 | 18.8% |
| 75+ | 10.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 21.1% |
| Owned outright | 28.0% |
| Rented | 10.2% |
| Vacant | 40.6% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 84.1% |
| Townhome | 2.2% |
| 2–4 units | 3.5% |
| 5–19 units | 0.4% |
| 20+ units | 0.0% |
| Mobile / other | 9.8% |
Businesses in 33042
215 business establishments with 1,259 employees (ZIP Codes Business Patterns 2023).
- Construction: 36
- Professional, Scientific, and Technical Services: 34
- Real Estate and Rental and Leasing: 28
- Administrative and Support and Waste Management and Remediation Services: 17
- Accommodation and Food Services: 17
- Retail Trade: 15
- Other Services (except Public Administration): 15
- Transportation and Warehousing: 11
EDDM carrier routes
33042 has 8 USPS carrier routes with 3,782 residential and 105 business mailboxes. Open the EDDM route map.
Carrier routes in 33042
33042 has 8 USPS carrier routes (8 rural (R)) with 3,782 residential and 105 business mailboxes. Routes range from 326 homes (R014) to 638 homes (R006); the median route has 475 homes. The Census counted 2,820 households in 33042 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 4 |
| 500–749 | 4 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 33042 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R016 — USPS business mailboxes 36, 517 homes
- Route R010 — USPS business mailboxes 25, 395 homes
- Route R014 — USPS business mailboxes 16, 326 homes
- Route R002 — USPS business mailboxes 10, 443 homes
- Route R004 — USPS business mailboxes 6, 608 homes
Select these 5 routes on the route map
Every carrier route in 33042
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R002 | Rural | 443 | 10 | $117,967 | — | — | — |
| R004 | Rural | 608 | 6 | $81,598 | — | — | — |
| R006 | Rural | 638 | 5 | $124,879 | — | — | — |
| R008 | Rural | 506 | 2 | $90,450 | — | — | — |
| R010 | Rural | 395 | 25 | $100,230 | — | — | — |
| R012 | Rural | 349 | 5 | $117,967 | — | — | — |
| R014 | Rural | 326 | 16 | $117,967 | — | — | — |
| R016 | Rural | 517 | 36 | $117,967 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 33042 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 33043 — Big Pine Key CDP, FL (15.2 mi)
Areas that include 33042
- Cudjoe Key, FL ZIP codes — 1 ZIP code
- Summerland Key, FL ZIP codes — 1 ZIP code
- Monroe County ZIP codes — 11 ZIP codes
- Florida ZIP code data
Where it ranks
- No. 2 of 8: highest median household income in Monroe County
- No. 2 of 8: highest median home value in Monroe County
- No. 3 of 8: highest share of owner-occupied homes in Monroe County
- No. 4 of 8: highest share of residents who moved in during the past year in Monroe County
- No. 4 of 8: lowest median age in Monroe County
- No. 5 of 8: highest median age in Monroe County
Mail every home in 33042
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 33042, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 33042 in?
- 33042 is a Summerland Key, FL mailing address. By land area, 19% lies inside Cudjoe Key; the rest is outside any Census-defined city or community.
- What county is 33042 in?
- 33042 is in Monroe County.
- What is the population of 33042?
- About 6,441 people (±651), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 6,841.
- What is the median household income in 33042?
- $103,041 (±$17,444), compared with $74,568 for Florida as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 33042?
- 8 USPS carrier routes with 3,782 residential and 105 business mailboxes (3,887 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 33042?
- The closest, measured center to center: 33043 (15.2 mi, Big Pine Key).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.