FIPS code 01127 is Walker County, Alabama. With a population of 64,978 (2022 ACS estimate), it ranks #21 in Alabama and #833 nationally. Walker County is part of the Birmingham, AL. The state FIPS code for Alabama is 01. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
01127
Population
64,978
2022 ACS · #833 nationally
Density
82.1/mi²
people per sq mile
Land Area
791
sq miles
Urban/Rural
Metro — 1M+ population
RUCC 1
How This FIPS Code Works
The 5-digit FIPS code 01127 is formed by combining the 2-digit state identifier 01 (Alabama) with the 3-digit county identifier 127. Together they uniquely identify Walker County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 01127
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 01127.
Median Household Income
$52,987
ACS B19013_001E
Poverty Rate
16.4%
ACS B17001 (below poverty level)
Median Age
41.8
ACS B01002_001E
Metropolitan Area
Adjacent Counties (7)
Counties that share a border with Walker County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 01127.
Federal Datasets Using Code 01127
FIPS code 01127 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 01127 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:127",
"in": "state:01",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Walker County, Alabama, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '01127';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '01'
AND county_fips = '127';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 1127 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "01",
county = "127",
year = 2022
)ZIP Codes in Walker 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 Walker County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 35580 | 100.0% |
| 35501 | 100.0% |
| 35504 | 100.0% |
| 35587 | 100.0% |
| 35550 | 100.0% |
| 35573 | 100.0% |
| 35584 | 100.0% |
| 35148 | 98.0% |
| 35503 | 91.4% |
| 35063 | 87.6% |
| 35579 | 77.0% |
| 35578 | 64.4% |
| 35130 | 56.0% |
| 35549 | 49.1% |
| 35062 | 34.9% |
| 35554 | 25.3% |
| 35033 | 12.2% |
| 35546 | 7.9% |
| 35006 | 2.3% |