53033 FipsDecoder
04005 County FIPS Code

Coconino County

Arizona · County seat: Flagstaff · Active county or equivalent

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FIPS code 04005 is Coconino County, Arizona. With a population of 144,705 (2022 ACS estimate), it ranks #7 in Arizona and #454 nationally. Coconino County is part of the Flagstaff, AZ. 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

04005

State FIPS

04

AZ

Population

144,705

2022 ACS · #454 nationally

Density

7.8/mi²

people per sq mile

Land Area

18,619

sq miles

Urban/Rural

Metro — under 250K population

RUCC 3

How This FIPS Code Works

04 005
04 = State FIPS (Arizona)
005 = County FIPS

The 5-digit FIPS code 04005 is formed by combining the 2-digit state identifier 04 (Arizona) with the 3-digit county identifier 005. Together they uniquely identify Coconino County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 04005

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 04005.

Median Household Income

$67,266

ACS B19013_001E

Poverty Rate

16.9%

ACS B17001 (below poverty level)

Median Age

31.7

ACS B01002_001E

Metropolitan Area

Adjacent Counties (6)

Counties that share a border with Coconino County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 04005.

Federal Datasets Using Code 04005

FIPS code 04005 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 04005 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 04005
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:005",
    "in":   "state:04",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Coconino County, Arizona, income, pop, ...]
SQL — filtering by county FIPS 04005
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '04005';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '04'
  AND county_fips = '005';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 4005 is WRONG for this county
R — tidycensus 04005
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "04",
  county    = "005",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 04 (not 4) and 005 (not 5) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

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

ZIP Code % in county
86435 100.0%
86001 100.0%
86003 100.0%
86004 100.0%
86005 100.0%
86011 100.0%
86015 100.0%
86016 100.0%
86017 100.0%
86018 100.0%
86020 100.0%
86035 100.0%
86036 100.0%
86038 100.0%
86040 100.0%
86045 100.0%
86046 100.0%
86052 100.0%
86053 100.0%
85931 100.0%
86023 100.0%
86024 100.0%
86030 73.3%
86320 70.4%
86022 67.6%
86044 55.5%
86047 28.4%
86336 27.1%
86337 24.7%
86054 5.9%

Showing top 30 of 31 ZIP codes by residential address share.

Other Counties in Arizona