Yankton County
South Dakota · County seat: Yankton · Active county or equivalent
FIPS code 46135 is Yankton County, South Dakota. With a population of 23,311 (2022 ACS estimate), it ranks #9 in South Dakota and #1712 nationally. Yankton County is part of the Yankton, SD. The state FIPS code for South Dakota is 46. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
46135
Population
23,311
2022 ACS · #1712 nationally
Density
44.7/mi²
people per sq mile
Land Area
521
sq miles
Urban/Rural
Nonmetro — urban 2.5K–19.9K, not adjacent to metro
RUCC 7
How This FIPS Code Works
The 5-digit FIPS code 46135 is formed by combining the 2-digit state identifier 46 (South Dakota) with the 3-digit county identifier 135. Together they uniquely identify Yankton County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 46135
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 46135.
Median Household Income
$68,847
ACS B19013_001E
Poverty Rate
8.0%
ACS B17001 (below poverty level)
Median Age
41.7
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with Yankton County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 46135.
Federal Datasets Using Code 46135
FIPS code 46135 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 46135 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:135",
"in": "state:46",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Yankton County, South Dakota, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '46135';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '46'
AND county_fips = '135';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 46135 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "46",
county = "135",
year = 2022
)ZIP Codes in Yankton 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 Yankton County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 57067 | 100.0% |
| 57078 | 100.0% |
| 57046 | 100.0% |
| 57040 | 96.6% |
| 57037 | 82.1% |
| 57031 | 76.7% |
| 57072 | 72.0% |
| 57045 | 28.5% |
| 57063 | 22.3% |
| 57070 | 11.9% |