Monroe County
Alabama · County seat: Monroeville · Active county or equivalent
FIPS code 01099 is Monroe County, Alabama. With a population of 19,816 (2022 ACS estimate), it ranks #46 in Alabama and #1880 nationally. 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
01099
Population
19,816
2022 ACS · #1880 nationally
Density
19.3/mi²
people per sq mile
Land Area
1,026
sq miles
Urban/Rural
Nonmetro — rural, adjacent to metro
RUCC 8
How This FIPS Code Works
The 5-digit FIPS code 01099 is formed by combining the 2-digit state identifier 01 (Alabama) with the 3-digit county identifier 099. Together they uniquely identify Monroe County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 01099
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 01099.
Median Household Income
$39,965
ACS B19013_001E
Poverty Rate
22.9%
ACS B17001 (below poverty level)
Median Age
43.7
ACS B01002_001E
Adjacent Counties (6)
Counties that share a border with Monroe County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 01099.
Federal Datasets Using Code 01099
FIPS code 01099 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 01099 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:099",
"in": "state:01",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Monroe County, Alabama, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '01099';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '01'
AND county_fips = '099';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 1099 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "01",
county = "099",
year = 2022
)ZIP Codes in Monroe 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 Monroe County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 36480 | 100.0% |
| 36481 | 100.0% |
| 36425 | 100.0% |
| 36439 | 100.0% |
| 36444 | 100.0% |
| 36445 | 100.0% |
| 36470 | 100.0% |
| 36460 | 96.9% |
| 36471 | 90.1% |
| 36768 | 26.6% |
| 36751 | 25.2% |
| 36475 | 13.1% |
| 36482 | 8.2% |
| 36502 | 7.8% |
| 36401 | 5.7% |
| 36033 | 2.0% |
| 36726 | 0.1% |