FIPS code 26125 is Oakland County, Michigan. With a population of 1,272,264 (2022 ACS estimate), it ranks #2 in Michigan and #33 nationally. Oakland 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
26125
Population
1,272,264
2022 ACS · #33 nationally
Density
1,466.3/mi²
people per sq mile
Land Area
868
sq miles
Urban/Rural
Metro — 1M+ population
RUCC 1
How This FIPS Code Works
The 5-digit FIPS code 26125 is formed by combining the 2-digit state identifier 26 (Michigan) with the 3-digit county identifier 125. Together they uniquely identify Oakland County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 26125
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 26125.
Median Household Income
$92,620
ACS B19013_001E
Poverty Rate
7.7%
ACS B17001 (below poverty level)
Median Age
41.1
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with Oakland County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 26125.
Federal Datasets Using Code 26125
FIPS code 26125 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 26125 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:125",
"in": "state:26",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Oakland County, Michigan, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '26125';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '26'
AND county_fips = '125';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 26125 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "26",
county = "125",
year = 2022
)ZIP Codes in Oakland 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 Oakland County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 48370 | 100.0% |
| 48017 | 100.0% |
| 48025 | 100.0% |
| 48030 | 100.0% |
| 48033 | 100.0% |
| 48034 | 100.0% |
| 48067 | 100.0% |
| 48069 | 100.0% |
| 48070 | 100.0% |
| 48071 | 100.0% |
| 48072 | 100.0% |
| 48073 | 100.0% |
| 48075 | 100.0% |
| 48076 | 100.0% |
| 48083 | 100.0% |
| 48084 | 100.0% |
| 48085 | 100.0% |
| 48098 | 100.0% |
| 48165 | 100.0% |
| 48009 | 100.0% |
| 48374 | 100.0% |
| 48375 | 100.0% |
| 48377 | 100.0% |
| 48381 | 100.0% |
| 48382 | 100.0% |
| 48383 | 100.0% |
| 48386 | 100.0% |
| 48390 | 100.0% |
| 48393 | 100.0% |
| 48220 | 100.0% |
Showing top 30 of 71 ZIP codes by residential address share.