Green County
Kentucky · County seat: Greensburg · Active county or equivalent
FIPS code 21087 is Green County, Kentucky. With a population of 11,198 (2022 ACS estimate), it ranks #96 in Kentucky and #2402 nationally. Green County is part of the Campbellsville, KY. The state FIPS code for Kentucky is 21. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
21087
Population
11,198
2022 ACS · #2402 nationally
Density
39.2/mi²
people per sq mile
Land Area
286
sq miles
Urban/Rural
Nonmetro — rural, adjacent to metro
RUCC 8
How This FIPS Code Works
The 5-digit FIPS code 21087 is formed by combining the 2-digit state identifier 21 (Kentucky) with the 3-digit county identifier 087. Together they uniquely identify Green County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 21087
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 21087.
Median Household Income
$38,595
ACS B19013_001E
Poverty Rate
21.4%
ACS B17001 (below poverty level)
Median Age
45.1
ACS B01002_001E
Metropolitan Area
Adjacent Counties (5)
Counties that share a border with Green County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 21087.
Federal Datasets Using Code 21087
FIPS code 21087 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 21087 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:087",
"in": "state:21",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Green County, Kentucky, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '21087';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '21'
AND county_fips = '087';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 21087 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "21",
county = "087",
year = 2022
)ZIP Codes in Green 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 Green County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 42743 | 97.3% |
| 42782 | 87.2% |
| 42764 | 87.0% |
| 42214 | 18.5% |
| 42746 | 15.2% |
| 42716 | 15.0% |
| 42718 | 7.2% |
| 42757 | 7.2% |