FIPS code 01091 is Marengo County, Alabama. With a population of 19,180 (2022 ACS estimate), it ranks #48 in Alabama and #1914 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
01091
Population
19,180
2022 ACS · #1914 nationally
Density
19.6/mi²
people per sq mile
Land Area
977
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 01091 is formed by combining the 2-digit state identifier 01 (Alabama) with the 3-digit county identifier 091. Together they uniquely identify Marengo County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 01091
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 01091.
Median Household Income
$42,975
ACS B19013_001E
Poverty Rate
21.5%
ACS B17001 (below poverty level)
Median Age
41.7
ACS B01002_001E
Adjacent Counties (8)
Counties that share a border with Marengo County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 01091.
Federal Datasets Using Code 01091
FIPS code 01091 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 01091 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:091",
"in": "state:01",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Marengo County, Alabama, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '01091';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '01'
AND county_fips = '091';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 1091 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "01",
county = "091",
year = 2022
)ZIP Codes in Marengo 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 Marengo County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 36782 | 100.0% |
| 36736 | 100.0% |
| 36748 | 100.0% |
| 36754 | 100.0% |
| 36763 | 100.0% |
| 36764 | 100.0% |
| 36732 | 100.0% |
| 36783 | 94.0% |
| 36738 | 73.1% |
| 36742 | 72.2% |
| 36784 | 26.2% |
| 36728 | 24.6% |
| 36786 | 19.3% |
| 36769 | 13.4% |
| 36773 | 10.6% |
| 36722 | 7.3% |