Five West Coast States That Border the Pacific Ocean

The United States' Pacific coastline spans five states — each with distinct geography, climate, and relationship to the ocean.

The Five States

1. Alaska — 6,640 miles of coastline (more than all other states combined). Arctic, subarctic, and temperate zones. Fishing, oil, shipping, wilderness.
2. Washington — 157 miles of outer coast; 3,000+ miles including Puget Sound. Rain shadow creates wet west/dry east. Major ports: Seattle, Tacoma.
3. Oregon — 363 miles. Dramatic headlands, dunes, temperate rainforests. Columbia River mouth. Port of Portland 100 miles inland.
4. California — 840 miles. Mediterranean climate south, temperate north. World's busiest port complex (LA/Long Beach). 68% of state population in coastal counties.
5. Hawaii — 750 miles (all islands). Only tropical U.S. state. Volcanic origins. Mid-Pacific strategic hub. Tourism, military, marine biodiversity.

What "West Coast" Means

Contiguously, "West Coast" usually means CA/OR/WA. Alaska and Hawaii are "Pacific states" but non-contiguous. All five share:

• Pacific Ring of Fire geology (earthquakes, volcanoes, tsunamis)
• Cold California Current (except Hawaii)
• Maritime trade gateway to Asia
• Coastal zone management challenges (erosion, development, sea-level rise)

By the Numbers

• Total Pacific coastline: ~8,750 miles (including tidal inlets)
• Combined coastal county population: ~50 million
• Exclusive Economic Zone (EEZ): 3.4 million km² — largest in world

Five states, one ocean — but five different Pacifics.