Macomb County
Michigan · County seat: Mount Clemens · Active county or equivalent
FIPS code 26099 is Macomb County, Michigan. With a population of 878,453 (2022 ACS estimate), it ranks #3 in Michigan and #63 nationally. Macomb County is part of the Detroit-Warren-Dearborn, 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
26099
Population
878,453
2022 ACS · #63 nationally
Density
1,833.1/mi²
people per sq mile
Land Area
479
sq miles
Urban/Rural
Metro — 1M+ population
RUCC 1
How This FIPS Code Works
The 5-digit FIPS code 26099 is formed by combining the 2-digit state identifier 26 (Michigan) with the 3-digit county identifier 099. Together they uniquely identify Macomb County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 26099
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 26099.
Median Household Income
$73,876
ACS B19013_001E
Poverty Rate
9.8%
ACS B17001 (below poverty level)
Median Age
41.0
ACS B01002_001E
Metropolitan Area
Adjacent Counties (4)
Counties that share a border with Macomb County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 26099.
Federal Datasets Using Code 26099
FIPS code 26099 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 26099 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:26",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Macomb County, Michigan, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '26099';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '26'
AND county_fips = '099';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 26099 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "26",
county = "099",
year = 2022
)ZIP Codes in Macomb 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 Macomb County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 48317 | 100.0% |
| 48015 | 100.0% |
| 48021 | 100.0% |
| 48026 | 100.0% |
| 48035 | 100.0% |
| 48036 | 100.0% |
| 48038 | 100.0% |
| 48315 | 100.0% |
| 48316 | 100.0% |
| 48005 | 100.0% |
| 48042 | 100.0% |
| 48043 | 100.0% |
| 48044 | 100.0% |
| 48045 | 100.0% |
| 48047 | 100.0% |
| 48048 | 100.0% |
| 48050 | 100.0% |
| 48051 | 100.0% |
| 48062 | 100.0% |
| 48065 | 100.0% |
| 48066 | 100.0% |
| 48080 | 100.0% |
| 48081 | 100.0% |
| 48082 | 100.0% |
| 48088 | 100.0% |
| 48089 | 100.0% |
| 48091 | 100.0% |
| 48092 | 100.0% |
| 48093 | 100.0% |
| 48094 | 100.0% |
Showing top 30 of 39 ZIP codes by residential address share.