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US ZIP Code Profile

ZIP Code 34145
Marco Island, Florida

ZIP code 34145 is in Marco Island, located in Collier County, Florida, within the Naples-Immokalee-Marco Island metro area. Its 2020 Census population was 15,717. The estimated median adjusted gross income per tax return is $122,895, and about 33% of filers report $200,000 or more.

2020 Population
15,717
Census ZCTA
County
Collier
FIPS 12021
Median income (est.)
$122,895
IRS SOI 2022
Land Area
16.302 mi²
+ 25.808 mi² water

01Location & Geography

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

Primary CityMarco Island, FL
CountyCollier County (FIPS 12021)
StateFlorida (FIPS 12)
Metro Area (MSA)Naples-Immokalee-Marco Island, FL Metro Area (34940)
Census Region / DivisionSouth Region · South Atlantic Division
Coordinates25.904093, -81.67585
Land / Water Area16.302 mi² land · 25.808 mi² water

02Income & Economics

Distribution of the 8,670 individual tax returns filed in 34145 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
15.1%
$25K–$50K
12.1%
$50K–$75K
9.3%
$75K–$100K
8.4%
$100K–$200K
21.9%
$200K+
33.1%
The $200,000+ bracket accounts for 89% of 34145's total adjusted gross income, from 33% of returns — a concentration that drives the gap between the median ($122,895) 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 34145's IRS income metrics, 2020–2022.

Median income (2021→2022)
$122,895
▼ 4.0%
Filers earning $200K+
33.1%
▼ 1.0 pt
Total filers
8,670
▲ 6.6%
GET /zipc/v2/zipcodes/34145/soi?year=… $97K 2020 $128K 2021 $123K 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 34145 ZCTA.

2000
15,213
 
2010
16,407
▲ +7.8%
2020
15,717
▼ -4.2%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 34145. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 34145

Marco Island and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 34145 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number115670
City AliasesMarco Island

07Frequently Asked Questions

What county is ZIP code 34145 in?

ZIP code 34145 is in Collier County, Florida (county FIPS code 12021).

What city is ZIP code 34145?

The primary USPS city for 34145 is Marco Island, FL.

What metro area (MSA) is 34145 in?

34145 is part of the Naples-Immokalee-Marco Island, FL Metro Area (MSA code 34940).

What is the population of ZIP code 34145?

The 2020 Census population of 34145 was 15,717 residents.

What is the median income in ZIP code 34145?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 34145 is about $122,895, with around 33% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.