Clay County
Nebraska · County seat: Clay Center · Active county or equivalent
FIPS code 31035 is Clay County, Nebraska. With a population of 6,088 (2022 ACS estimate), it ranks #47 in Nebraska and #2801 nationally. Clay County is part of the Hastings, NE. The state FIPS code for Nebraska is 31. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
31035
Population
6,088
2022 ACS · #2801 nationally
Density
10.6/mi²
people per sq mile
Land Area
572
sq miles
Urban/Rural
Nonmetro — completely rural
RUCC 9
How This FIPS Code Works
The 5-digit FIPS code 31035 is formed by combining the 2-digit state identifier 31 (Nebraska) with the 3-digit county identifier 035. Together they uniquely identify Clay County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 31035
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 31035.
Median Household Income
$73,933
ACS B19013_001E
Poverty Rate
8.7%
ACS B17001 (below poverty level)
Median Age
39.5
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with Clay County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 31035.
Federal Datasets Using Code 31035
FIPS code 31035 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 31035 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:035",
"in": "state:31",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Clay County, Nebraska, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '31035';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '31'
AND county_fips = '035';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 31035 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "31",
county = "035",
year = 2022
)ZIP Codes in Clay 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 Clay County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 68954 | 100.0% |
| 68452 | 100.0% |
| 68938 | 100.0% |
| 68975 | 100.0% |
| 68933 | 100.0% |
| 68944 | 89.4% |
| 68979 | 64.3% |
| 68935 | 63.8% |
| 68941 | 58.7% |
| 68980 | 46.5% |
| 68934 | 31.2% |
| 68901 | 14.3% |
| 68818 | 6.0% |
| 68436 | 4.4% |
| 68957 | 1.8% |