Hawaii River Map showing major rivers in Hawaii, River start and end point, county boundaries.
River Map of Hawaii State
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Rivers and Waterways in Hawaii
Hawaii鈥檚 rivers are shaped by its volcanic islands, steep terrain, and heavy rainfall, especially on the windward sides. Most rivers are short and fast-flowing, quickly draining from mountain slopes into the Pacific Ocean. Unlike mainland states, Hawaii does not have large river systems, but it features many streams, waterfalls, and drainage channels. Natural lakes are rare, and most water storage comes from reservoirs and groundwater sources that support agriculture, communities, and ecosystems across the islands.
Major Rivers in Hawaii
| River | Length (Approx.) | Region | Flows Into |
|---|---|---|---|
| Wailuku River | 28 mi | Hawaii (Big Island) | Pacific Ocean |
| Hanalei River | 16 mi | Kauai | Pacific Ocean |
| Wainiha River | 18 mi | Kauai | Pacific Ocean |
| Waimea River | 20 mi | Kauai | Pacific Ocean |
| Anahulu River | 7 mi | Oahu | Pacific Ocean |
| Kalihi Stream | 8 mi | Oahu | Pacific Ocean |
| Manoa Stream | 7 mi | Oahu | Pacific Ocean |
| Nu'uanu Stream | 6 mi | Oahu | Pacific Ocean |
| Iao Stream | 10 mi | Maui | Pacific Ocean |
| Waikapu Stream | 8 mi | Maui | Pacific Ocean |
| Wailua River | 20 mi | Kauai | Pacific Ocean |
| Hanapepe River | 15 mi | Kauai | Pacific Ocean |
| Makaweli River | 12 mi | Kauai | Pacific Ocean |
| Kolekole Stream | 6 mi | Hawaii (Big Island) | Pacific Ocean |
| Hamakua Stream | 9 mi | Hawaii (Big Island) | Pacific Ocean |
| Kahakuloa Stream | 7 mi | Maui | Pacific Ocean |
| Honokohau Stream | 6 mi | Maui | Pacific Ocean |
| Wailoa River | 1 mi | Hawaii (Big Island) | Pacific Ocean |
Major Lakes in Hawaii
| Lake | Type | Region |
|---|---|---|
| Lake Waiau | Natural lake | Hawaii (Big Island) |
| Halulu Lake | Natural lake | Niihau |
| Loko Waka Pond | Reservoir | Kauai |
| Wahiawa Reservoir | Reservoir | Oahu |
| Nu'uanu Reservoir | Reservoir | Oahu |
| Kaneohe Reservoir | Reservoir | Oahu |
| Kaloko Reservoir | Reservoir | Kauai |
| Kualapuu Reservoir | Reservoir | Molokai |
| Waikamoi Reservoir | Reservoir | Maui |
| Pu'u Lua Reservoir | Reservoir | Hawaii (Big Island) |
Major River Basins in Hawaii
Hawaii鈥檚 river basins are relatively small and island-based, with water flowing quickly from mountain interiors to the coast. These basins are influenced by rainfall patterns and volcanic terrain, making them essential for freshwater supply and maintaining native ecosystems.
- Wailuku River Basin
- Hanalei River Basin
- Wailua River Basin
- Waimea River Basin
- Anahulu River Basin
- Iao Stream Basin
- Nu'uanu Stream Basin
- Kalihi Stream Basin
- Hanapepe River Basin
Hawaii Rivers Facts
| State | Hawaii |
| Total Rivers & Streams | 376+ perennial streams |
| Major Rivers | Wailuku, Hanalei, Wailua |
| Total Waterway Length | 5,000+ miles |
| Main Drainage | Pacific Ocean |
| Longest River | Wailuku River |
| Shortest River | Wailoa River |
| Major River Basins | 9 Primary Basins |
| Primary Outlet | Pacific Ocean |
| Key Uses | Water supply, agriculture, ecosystems, recreation |
| Longest River Within State | Wailuku River |
| Number of River Basins | 8鈥�10 Basins |
| Major Reservoirs | Wahiawa, Nu'uanu, Kaloko Reservoirs |
| Primary Water Source | Rainfall and groundwater |
River Maps of the 50 U.S. States 鈥� Click on a State to View Its River Map
- Alabama River Map
- Alaska River Map
- Arizona River Map
- Arkansas River Map
- California River Map
- Colorado River Map
- Connecticut River Map
- Delaware River Map
- Florida River Map
- Georgia River Map
- Hawaii River Map
- Idaho River Map
- Illinois River Map
- Indiana River Map
- Iowa River Map
- Kansas River Map
- Kentucky River Map
- Louisiana River Map
- Maine River Map
- Maryland River Map
- Massachusetts River Map
- Michigan River Map
- Minnesota River Map
- Mississippi River Map
- Missouri River Map
- Montana River Map
- Nebraska River Map
- Nevada River Map
- New Hampshire River Map
- New Jersey River Map
- New Mexico River Map
- New York River Map
- North Carolina River Map
- North Dakota River Map
- Ohio River Map
- Oklahoma River Map
- Oregon River Map
- Pennsylvania River Map
- Rhode Island River Map
- South Carolina River Map
- South Dakota River Map
- Tennessee River Map
- Texas River Map
- Utah River Map
- Vermont River Map
- Virginia River Map
- Washington River Map
- West Virginia River Map
- Wisconsin River Map
- Wyoming River Map