Arizona County Map
Labeled county boundary map and complete directory of all 15 counties in Arizona (AZ, State FIPS 04). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 15 counties in Arizona. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
Arizona County Statistics & Summary
Total Counties
15
Largest by Land Area
Coconino County
Smallest by Land Area
Santa Cruz County
All 15 Counties in Arizona (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Apache County | 04001 | St. Johns | 11,198.4 | 35.385°, -109.490° | Official Site |
| Cochise County | 04003 | Bisbee | 6,209.9 | 31.842°, -109.776° | Official Site |
| Coconino County | 04005 | Flagstaff | 18,616.4 | 35.830°, -111.774° | Official Site |
| Gila County | 04007 | Globe | 4,757.6 | 33.790°, -110.812° | Official Site |
| Graham County | 04009 | Safford | 4,621.9 | 32.932°, -109.878° | Official Site |
| Greenlee County | 04011 | Clifton | 1,842.8 | 33.239°, -109.242° | Official Site |
| La Paz County | 04012 | Parker | 4,496.6 | 33.728°, -114.039° | Official Site |
| Maricopa County | 04013 | Phoenix | 9,202 | 33.345°, -112.499° | — |
| Mohave County | 04015 | Kingman | 13,332.1 | 35.718°, -113.750° | Official Site |
| Navajo County | 04017 | Holbrook | 9,949.5 | 35.391°, -110.321° | Official Site |
| Pima County | 04019 | Tucson | 9,188.7 | 32.128°, -111.784° | Official Site |
| Pinal County | 04021 | Florence | 5,366.7 | 32.919°, -111.366° | Official Site |
| Santa Cruz County | 04023 | Nogales | 1,236.3 | 31.526°, -110.845° | Official Site |
| Yavapai County | 04025 | Prescott | 8,122.9 | 34.654°, -112.583° | Official Site |
| Yuma County | 04027 | Yuma | 5,513.8 | 32.774°, -113.911° | Official Site |
How Arizona Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, Arizona (AZ) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 04 and covers 113,656 square miles of land area across 15 counties in the Mountain Standard Time (MST, no DST in most of Arizona; Navajo Nation observes MDT) zone (with Phoenix as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 04 with a 3-digit county code (ranging alphabetically from Apache County at 04001 to Yuma County at 04027).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in Arizona carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in Arizona are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 15 administrative seats and 14 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which Arizona county a specific home or business address sits in? Open the Blank Map of Arizona, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering Arizona: