FIPS code 21183 is Ohio County, Kentucky. With a population of 23,782 (2022 ACS estimate), it ranks #50 in Kentucky and #1689 nationally. 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
21183
Population
23,782
2022 ACS · #1689 nationally
Density
40.5/mi²
people per sq mile
Land Area
587
sq miles
Urban/Rural
Nonmetro — urban 2.5K–19.9K, adjacent to metro
RUCC 6
How This FIPS Code Works
The 5-digit FIPS code 21183 is formed by combining the 2-digit state identifier 21 (Kentucky) with the 3-digit county identifier 183. Together they uniquely identify Ohio County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 21183
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 21183.
Median Household Income
$52,474
ACS B19013_001E
Poverty Rate
14.0%
ACS B17001 (below poverty level)
Median Age
41.0
ACS B01002_001E
Adjacent Counties (7)
Counties that share a border with Ohio County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 21183.
Federal Datasets Using Code 21183
FIPS code 21183 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 21183 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:183",
"in": "state:21",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Ohio County, Kentucky, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '21183';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '21'
AND county_fips = '183';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 21183 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "21",
county = "183",
year = 2022
)ZIP Codes in Ohio 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 Ohio County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 42369 | 100.0% |
| 42328 | 100.0% |
| 42338 | 100.0% |
| 42347 | 100.0% |
| 42354 | 100.0% |
| 42370 | 100.0% |
| 42333 | 94.9% |
| 42320 | 92.5% |
| 42349 | 89.9% |
| 42343 | 76.3% |
| 42361 | 69.2% |
| 42378 | 63.1% |
| 42368 | 44.4% |
| 42352 | 40.6% |
| 42376 | 10.6% |
| 40119 | 4.5% |
| 42366 | 4.2% |