FIPS code 56025 is Natrona County, Wyoming. With a population of 79,506 (2022 ACS estimate), it ranks #2 in Wyoming and #715 nationally. Natrona County is part of the Casper, WY. The state FIPS code for Wyoming is 56. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
56025
Population
79,506
2022 ACS · #715 nationally
Density
14.9/mi²
people per sq mile
Land Area
5,340
sq miles
Urban/Rural
Metro — under 250K population
RUCC 3
How This FIPS Code Works
The 5-digit FIPS code 56025 is formed by combining the 2-digit state identifier 56 (Wyoming) with the 3-digit county identifier 025. Together they uniquely identify Natrona County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 56025
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 56025.
Median Household Income
$69,104
ACS B19013_001E
Poverty Rate
9.1%
ACS B17001 (below poverty level)
Median Age
37.7
ACS B01002_001E
Metropolitan Area
Adjacent Counties (5)
Counties that share a border with Natrona County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 56025.
Federal Datasets Using Code 56025
FIPS code 56025 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 56025 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:025",
"in": "state:56",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Natrona County, Wyoming, income, pop, ...]
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '56025';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '56'
AND county_fips = '025';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 56025 is WRONG for this county
library(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "56",
county = "025",
year = 2022
)
ZIP Codes in Natrona 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 Natrona County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 82648 | 100.0% |
| 82604 | 100.0% |
| 82609 | 100.0% |
| 82643 | 100.0% |
| 82644 | 100.0% |
| 82646 | 100.0% |
| 82601 | 100.0% |
| 82630 | 100.0% |
| 82635 | 100.0% |
| 82638 | 100.0% |
| 82636 | 97.6% |
| 82620 | 91.9% |
| 82642 | 13.3% |
| 82639 | 5.7% |