Founded in 1905, Honolulu County is one of 5 counties in the state of Hawaii. Historically, Honolulu County was formed from Oʻahu and the Northwestern Hawaiian Islands (except Midway Atoll). The city of Honolulu is the county seat. With FIPS code of 3, Honolulu County has a population of 1,000,890 and area of 597 square miles (1,546 km2).
List of all cities in Honolulu County, HI alphabetically
| City/Town | Postal Code | Area Code |
| Aiea, HI | 96701 | 808 |
| Bancorp, HI | 96849 | 808 |
| Bancorp Hawaii, HI | 96849 | 808 |
| Bank of Hawaii, HI | 96846 | 808 |
| Board of Water Supply, HI | 96843 | 808 |
| Camp H M Smith, HI | 96861 | 808 |
| Camp Smith, HI | 96861 | 808 |
| East West Center, HI | 96848 | 808 |
| Ewa Beach, HI | 96706 | 808 |
| First Hawaiian Bank, HI | 96847 | 808 |
| Fort Shafter, HI | 96858 | 808 |
| Haleiwa, HI | 96712 | 808 |
| Hauula, HI | 96717 | 808 |
| Hawaiian Electric Company, HI | 96840 | 808 |
| Hawaiian Telcom, HI | 96841 | 808 |
| Helemano Mltry Reservation, HI | 96857 | 808 |
| Hickam AFB, HI | 96853 | 808 |
| Honolulu, HI | 96801 | 808 |
| 96802 | 808 | |
| 96803 | 808 | |
| 96804 | 808 | |
| 96805 | 808 | |
| 96806 | 808 | |
| 96807 | 808 | |
| 96808 | 808 | |
| 96809 | 808 | |
| 96810 | 808 | |
| 96811 | 808 | |
| 96812 | 808 | |
| 96813 | 808 | |
| 96814 | 808 | |
| 96815 | 808 | |
| 96816 | 808 | |
| 96817 | 808 | |
| 96818 | 808 | |
| 96819 | 808 | |
| 96820 | 808 | |
| 96821 | 808 | |
| 96822 | 808 | |
| 96823 | 808 | |
| 96824 | 808 | |
| 96825 | 808 | |
| 96826 | 808 | |
| 96827 | 808 | |
| 96828 | 808 | |
| 96830 | 808 | |
| 96836 | 808 | |
| 96837 | 808 | |
| 96838 | 808 | |
| 96839 | 808 | |
| 96840 | 808 | |
| 96841 | 808 | |
| 96843 | 808 | |
| 96844 | 808 | |
| 96846 | 808 | |
| 96847 | 808 | |
| 96848 | 808 | |
| 96849 | 808 | |
| 96850 | 808 | |
| Kaaawa, HI | 96730 | 808 |
| Kahuku, HI | 96731 | 808 |
| Kailua, HI | 96734 | 808 |
| Kalaeloa, HI | 96707 | 808 |
| Kaneohe, HI | 96744 | 808 |
| Kapolei, HI | 96707 | 808 |
| 96709 | 808 | |
| Kunia, HI | 96759 | 808 |
| Laie, HI | 96762 | 808 |
| M C B H Kaneohe Bay, HI | 96863 | 808 |
| Makakilo, HI | 96707 | 808 |
| Mcbh Kaneohe Bay, HI | 96863 | 808 |
| Mililani, HI | 96789 | 808 |
| Nanakuli, HI | 96792 | 808 |
| Pearl City, HI | 96782 | 808 |
| Pearl Harbor, HI | 96860 | 808 |
| Pearl Harbor Naval Base, HI | 96860 | 808 |
| Schofield, HI | 96857 | 808 |
| Schofield Barracks, HI | 96857 | 808 |
| Tripler Amc, HI | 96859 | 808 |
| Tripler Army Medical Center, HI | 96859 | 808 |
| University of Hawaii, HI | 96844 | 808 |
| Wahiawa, HI | 96786 | 808 |
| 96857 | 808 | |
| Waialua, HI | 96791 | 808 |
| Waianae, HI | 96792 | 808 |
| Waimanalo, HI | 96795 | 808 |
| Waipahu, HI | 96797 | 808 |
| Wake Island, HI | 96898 | 808 |
| Wheeler Army Airfield, HI | 96854 | 808 |
Map of Cities in Honolulu County, HI
