FIPS code 19167 is Sioux County, Iowa. With a population of 35,815 (2022 ACS estimate), it ranks #19 in Iowa and #1309 nationally. The state FIPS code for Iowa is 19. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
19167
Population
35,815
2022 ACS · #1309 nationally
Density
46.6/mi²
people per sq mile
Land Area
768
sq miles
Urban/Rural
Nonmetro — urban 2.5K–19.9K, adjacent to metro
RUCC 6
How This FIPS Code Works
The 5-digit FIPS code 19167 is formed by combining the 2-digit state identifier 19 (Iowa) with the 3-digit county identifier 167. Together they uniquely identify Sioux County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 19167
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 19167.
Median Household Income
$81,914
ACS B19013_001E
Poverty Rate
6.1%
ACS B17001 (below poverty level)
Median Age
34.4
ACS B01002_001E
Adjacent Counties (7)
Counties that share a border with Sioux County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 19167.
Federal Datasets Using Code 19167
FIPS code 19167 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 19167 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:167",
"in": "state:19",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Sioux County, Iowa, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '19167';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '19'
AND county_fips = '167';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 19167 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "19",
county = "167",
year = 2022
)ZIP Codes in Sioux 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 Sioux County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 51041 | 100.0% |
| 51011 | 100.0% |
| 51250 | 100.0% |
| 51234 | 100.0% |
| 51003 | 100.0% |
| 51244 | 100.0% |
| 51036 | 100.0% |
| 51247 | 95.5% |
| 51239 | 92.7% |
| 51027 | 83.9% |
| 51023 | 70.2% |
| 51238 | 67.7% |
| 51201 | 49.2% |
| 51022 | 39.5% |
| 51240 | 14.5% |
| 57034 | 7.7% |
| 51235 | 3.1% |
| 51050 | 1.4% |
| 51031 | 1.1% |