53033 FipsDecoder
04001 County FIPS Code

Apache County

Arizona · County seat: St. Johns · Active county or equivalent

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FIPS code 04001 is Apache County, Arizona. With a population of 66,054 (2022 ACS estimate), it ranks #10 in Arizona and #815 nationally. The state FIPS code for Arizona is 04. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.

County FIPS

04001

State FIPS

04

AZ

Population

66,054

2022 ACS · #815 nationally

Density

5.9/mi²

people per sq mile

Land Area

11,198

sq miles

Urban/Rural

Nonmetro — rural, adjacent to metro

RUCC 8

How This FIPS Code Works

04 001
04 = State FIPS (Arizona)
001 = County FIPS

The 5-digit FIPS code 04001 is formed by combining the 2-digit state identifier 04 (Arizona) with the 3-digit county identifier 001. Together they uniquely identify Apache County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 04001

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 04001.

Median Household Income

$37,483

ACS B19013_001E

Poverty Rate

32.5%

ACS B17001 (below poverty level)

Median Age

35.6

ACS B01002_001E

Adjacent Counties (9)

Counties that share a border with Apache County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 04001.

Federal Datasets Using Code 04001

FIPS code 04001 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 04001 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.

Census ACS API — Python 04001
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:001",
    "in":   "state:04",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Apache County, Arizona, income, pop, ...]
SQL — filtering by county FIPS 04001
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '04001';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '04'
  AND county_fips = '001';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 4001 is WRONG for this county
R — tidycensus 04001
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "04",
  county    = "001",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 04 (not 4) and 001 (not 1) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

ZIP Codes in Apache 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 Apache County. Why FIPS ≠ ZIP →

ZIP Code % in county
86538 100.0%
86556 100.0%
85920 100.0%
85924 100.0%
85925 100.0%
85927 100.0%
86508 100.0%
86511 100.0%
86512 100.0%
86544 100.0%
86535 100.0%
86540 100.0%
85932 100.0%
85936 100.0%
85938 100.0%
85940 100.0%
86028 100.0%
86547 100.0%
86545 100.0%
86502 100.0%
86506 100.0%
86507 100.0%
86504 98.7%
86503 95.3%
85930 88.6%
86505 84.2%
86514 83.9%
86520 78.0%
87328 38.8%
84531 21.3%

Showing top 30 of 34 ZIP codes by residential address share.

Other Counties in Arizona