Collier County
Florida · County seat: East Naples · Active county or equivalent
FIPS code 12021 is Collier County, Florida. With a population of 380,221 (2022 ACS estimate), it ranks #18 in Florida and #188 nationally. Collier County is part of the Naples-Marco Island, FL. The state FIPS code for Florida is 12. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
12021
Population
380,221
2022 ACS · #188 nationally
Density
190.3/mi²
people per sq mile
Land Area
1,998
sq miles
Urban/Rural
Metro — 250K–1M population
RUCC 2
How This FIPS Code Works
The 5-digit FIPS code 12021 is formed by combining the 2-digit state identifier 12 (Florida) with the 3-digit county identifier 021. Together they uniquely identify Collier County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 12021
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 12021.
Median Household Income
$82,011
ACS B19013_001E
Poverty Rate
10.4%
ACS B17001 (below poverty level)
Median Age
52.2
ACS B01002_001E
Metropolitan Area
Adjacent Counties (5)
Counties that share a border with Collier County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 12021.
Federal Datasets Using Code 12021
FIPS code 12021 appears as the county identifier in the following federal datasets. Analysts joining data across these sources use this code as the common geographic key.
Using FIPS Code 12021 in Code
Common patterns for querying federal datasets by this county's FIPS code. The leading zeros are significant — always treat FIPS codes as strings, not integers.
import requests
url = "https://api.census.gov/data/2022/acs/acs5"
params = {
"get": "NAME,B19013_001E,B01003_001E",
"for": "county:021",
"in": "state:12",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Collier County, Florida, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '12021';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '12'
AND county_fips = '021';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 12021 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "12",
county = "021",
year = 2022
)ZIP Codes in Collier County
ZIP codes do not align perfectly with county boundaries — a single ZIP code can span multiple counties, and a county can contain parts of many ZIP codes. The ratios below (from the Census 2020 ZCTA relationship file) show the land area share of each ZCTA that falls within Collier County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 34145 | 100.0% |
| 34102 | 100.0% |
| 34103 | 100.0% |
| 34104 | 100.0% |
| 34105 | 100.0% |
| 34108 | 100.0% |
| 34109 | 100.0% |
| 34120 | 100.0% |
| 34137 | 100.0% |
| 34138 | 100.0% |
| 34139 | 100.0% |
| 34140 | 100.0% |
| 34101 | 100.0% |
| 34112 | 100.0% |
| 34113 | 100.0% |
| 34114 | 100.0% |
| 34116 | 100.0% |
| 34117 | 100.0% |
| 34119 | 98.2% |
| 34110 | 94.8% |
| 34142 | 82.1% |
| 34141 | 75.0% |
| 34134 | 9.7% |
| 34135 | 0.0% |