Madison County
North Carolina · County seat: Marshall · Active county or equivalent
FIPS code 37115 is Madison County, North Carolina. With a population of 21,414 (2022 ACS estimate), it ranks #79 in North Carolina and #1793 nationally. Madison County is part of the Asheville, NC. The state FIPS code for North Carolina is 37. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
37115
Population
21,414
2022 ACS · #1793 nationally
Density
47.6/mi²
people per sq mile
Land Area
450
sq miles
Urban/Rural
Metro — 250K–1M population
RUCC 2
How This FIPS Code Works
The 5-digit FIPS code 37115 is formed by combining the 2-digit state identifier 37 (North Carolina) with the 3-digit county identifier 115. Together they uniquely identify Madison County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 37115
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 37115.
Median Household Income
$56,664
ACS B19013_001E
Poverty Rate
12.5%
ACS B17001 (below poverty level)
Median Age
44.6
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with Madison County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 37115.
Federal Datasets Using Code 37115
FIPS code 37115 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 37115 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:115",
"in": "state:37",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Madison County, North Carolina, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '37115';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '37'
AND county_fips = '115';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 37115 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "37",
county = "115",
year = 2022
)ZIP Codes in Madison 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 Madison County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 28753 | 97.8% |
| 28754 | 94.6% |
| 28743 | 81.2% |
| 28748 | 10.9% |
| 28787 | 5.4% |
| 28701 | 4.0% |