FIPS code 39123 is Ottawa County, Ohio. With a population of 40,367 (2022 ACS estimate), it ranks #62 in Ohio and #1186 nationally. Ottawa County is part of the Sandusky, OH. The state FIPS code for Ohio is 39. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
39123
Population
40,367
2022 ACS · #1186 nationally
Density
158.4/mi²
people per sq mile
Land Area
255
sq miles
Urban/Rural
Metro — under 250K population
RUCC 3
How This FIPS Code Works
The 5-digit FIPS code 39123 is formed by combining the 2-digit state identifier 39 (Ohio) with the 3-digit county identifier 123. Together they uniquely identify Ottawa County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 39123
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 39123.
Median Household Income
$69,515
ACS B19013_001E
Poverty Rate
8.8%
ACS B17001 (below poverty level)
Median Age
49.8
ACS B01002_001E
Metropolitan Area
Adjacent Counties (4)
Counties that share a border with Ottawa County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 39123.
Federal Datasets Using Code 39123
FIPS code 39123 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 39123 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:123",
"in": "state:39",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Ottawa County, Ohio, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '39123';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '39'
AND county_fips = '123';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 39123 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "39",
county = "123",
year = 2022
)ZIP Codes in Ottawa 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 Ottawa County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 43456 | 100.0% |
| 43439 | 100.0% |
| 43440 | 100.0% |
| 43468 | 100.0% |
| 43446 | 100.0% |
| 43452 | 100.0% |
| 43458 | 100.0% |
| 43408 | 100.0% |
| 43432 | 100.0% |
| 43433 | 100.0% |
| 43436 | 100.0% |
| 43449 | 97.5% |
| 43416 | 85.9% |
| 43445 | 82.8% |
| 43430 | 79.2% |
| 43412 | 39.6% |
| 43447 | 30.1% |
| 43469 | 8.1% |
| 43442 | 4.0% |
| 43420 | 0.2% |