FIPS code 26115 is Monroe County, Michigan. With a population of 154,823 (2022 ACS estimate), it ranks #15 in Michigan and #433 nationally. Monroe County is part of the Monroe, MI. The state FIPS code for Michigan is 26. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
26115
Population
154,823
2022 ACS · #433 nationally
Density
281.8/mi²
people per sq mile
Land Area
549
sq miles
Urban/Rural
Metro — under 250K population
RUCC 3
How This FIPS Code Works
The 5-digit FIPS code 26115 is formed by combining the 2-digit state identifier 26 (Michigan) with the 3-digit county identifier 115. 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 26115
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 26115.
Median Household Income
$72,573
ACS B19013_001E
Poverty Rate
10.9%
ACS B17001 (below poverty level)
Median Age
42.6
ACS B01002_001E
Metropolitan Area
Adjacent Counties (4)
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 26115.
Federal Datasets Using Code 26115
FIPS code 26115 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 26115 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:26",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Monroe County, Michigan, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '26115';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '26'
AND county_fips = '115';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 26115 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "26",
county = "115",
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 |
|---|---|
| 48179 | 100.0% |
| 48166 | 100.0% |
| 48177 | 100.0% |
| 48182 | 100.0% |
| 48131 | 100.0% |
| 48133 | 100.0% |
| 49270 | 100.0% |
| 48140 | 100.0% |
| 48144 | 100.0% |
| 48145 | 100.0% |
| 48157 | 100.0% |
| 48159 | 100.0% |
| 48161 | 100.0% |
| 48162 | 100.0% |
| 48117 | 99.4% |
| 49267 | 79.0% |
| 48160 | 51.9% |
| 49276 | 31.1% |
| 49238 | 29.9% |
| 48134 | 15.2% |
| 48191 | 12.3% |
| 49229 | 10.7% |
| 48164 | 3.7% |
| 48111 | 0.6% |
| 49228 | 0.5% |