Hawaii County Map
Labeled county boundary map and complete directory of all 5 counties in Hawaii (HI, State FIPS 15). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 5 counties in Hawaii. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
Hawaii County Statistics & Summary
Total Counties
5
Largest by Land Area
Hawaii County
Smallest by Land Area
Kalawao County
All 5 Counties in Hawaii (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Hawaii County | 15001 | Hilo | 4,028.4 | 19.598°, -155.502° | Official Site |
| Honolulu County | 15003 | Honolulu | 600.8 | 21.461°, -158.202° | — |
| Kalawao County | 15005 | — | 12 | 21.219°, -156.974° | — |
| Kauai County | 15007 | Līhuʻe | 619.8 | 22.012°, -159.706° | Official Site |
| Maui County | 15009 | Wailuku | 1,161.5 | 20.856°, -156.602° | Official Site |
How Hawaii Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, Hawaii (HI) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 15 and covers 6,423 square miles of land area across 5 counties in the Hawaii–Aleutian Standard Time (HST, no DST) zone (with Honolulu as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 15 with a 3-digit county code (ranging alphabetically from Hawaii County at 15001 to Maui County at 15009).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in Hawaii 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 Hawaii 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 4 administrative seats and 3 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which Hawaii county a specific home or business address sits in? Open the Blank Map of Hawaii, 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.