FIPS code 47109 is McNairy County, Tennessee. With a population of 25,895 (2022 ACS estimate), it ranks #56 in Tennessee and #1603 nationally. The state FIPS code for Tennessee is 47. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
47109
Population
25,895
2022 ACS · #1603 nationally
Density
46.0/mi²
people per sq mile
Land Area
563
sq miles
Urban/Rural
Nonmetro — rural, adjacent to metro
RUCC 8
How This FIPS Code Works
The 5-digit FIPS code 47109 is formed by combining the 2-digit state identifier 47 (Tennessee) with the 3-digit county identifier 109. Together they uniquely identify McNairy County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 47109
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 47109.
Median Household Income
$46,920
ACS B19013_001E
Poverty Rate
16.7%
ACS B17001 (below poverty level)
Median Age
42.9
ACS B01002_001E
Adjacent Counties (4)
Counties that share a border with McNairy County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 47109.
Federal Datasets Using Code 47109
FIPS code 47109 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 47109 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:109",
"in": "state:47",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [McNairy County, Tennessee, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '47109';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '47'
AND county_fips = '109';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 47109 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "47",
county = "109",
year = 2022
)ZIP Codes in McNairy 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 McNairy County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 38375 | 100.0% |
| 38339 | 100.0% |
| 38367 | 100.0% |
| 38315 | 91.0% |
| 38379 | 90.5% |
| 38357 | 75.1% |
| 38061 | 71.5% |
| 38334 | 70.1% |
| 38310 | 69.5% |
| 38359 | 14.6% |
| 38044 | 13.4% |
| 38332 | 13.1% |
| 38361 | 8.2% |
| 38376 | 4.0% |
| 38340 | 0.1% |