Hawaii Counties, Demographics & Geography
Complete official guide to all 5 counties in Hawaii (HI). Explore 2024 US Census population estimates, county seats, FIPS codes, land areas, and interactive mapping tools powered by GeoMap Suite.
Hawaii County Breakdown
Showing 5 of 5 documented counties and seats.
County Name | FIPS | County Seat | Population (Census) | Land Area | Quick Tool |
|---|---|---|---|---|---|
| City and County of Honolulu | 15003 | Honolulu | 1,016,508 | 601 sq mi | Lookup |
| Hawaii County (The Big Island) | 15001 | Hilo | 200,629 | 4,028 sq mi | Lookup |
| Maui County | 15009 | Wailuku | 164,754 | 1,162 sq mi | Lookup |
| Kauai County | 15007 | Lihue | 73,298 | 622 sq mi | Lookup |
| Kalawao County | 15005 | Kalaupapa | 82 | 12 sq mi | Lookup |
Geographic Structure of Hawaii Counties
County Administration & Governance
In Hawaii, county governments manage vital public infrastructure, tax assessments, law enforcement, judicial courts, election administration, and public records. The county seat (Honolulu and other municipal headquarters) houses the primary courthouse, commissioners, and sheriff’s department.
All Hawaii counties carry a unique 5-digit Federal Information Processing Standard (FIPS) code, where the first two digits (15) designate the state and the remaining three digits identify each specific jurisdiction.
Geographic & Demographic Highlights
- Most Populous County:City and County of Honolulu (1,016,508 residents)
- Largest by Land Area:Hawaii County (The Big Island) (4,028 sq mi)
- State Capital:Honolulu
- Census Bureau Region:West United States
Demographic calculations derive from the United States Census Bureau 2024 Population Estimates Program (PEP) and TIGER/Line geographic boundary files.