List of highest points in Washington by county
This is a list of highest points in the U.S. state of Washington, in alphabetical order by county.
| County | Name | Height feet / m | Prominence | Range | Notes |
| Adams | Karakul Hills | North Columbia Plateau | |||
| Asotin | Ray Ridge | Blue Mountains | |||
| Benton | Lookout Summit | Rattlesnake Hills | |||
| Chelan | Bonanza Peak | North Cascades | |||
| Clallam | Gray Wolf Ridge | Olympic Mountains | |||
| Clark | Sturgeon Rock-West Ridge | South Washington Cascades | |||
| Columbia | Oregon Butte | Blue Mountains | |||
| Cowlitz | Goat Mountain in Mount St. Helens National Volcanic Monument | South Washington Cascades | |||
| Douglas | Badger Mountain | North Columbia Plateau | |||
| Ferry | Copper Butte | Monashee Mountains | |||
| Franklin | Franklin County High Point | North Columbia Plateau | |||
| Garfield | Diamond Peak | Blue Mountains | |||
| Grant | Beezley Hills | North Columbia Plateau | |||
| Grays Harbor | Shoulder of Wynoochee Point | Satsop Hills | The actual Grays Harbor County high point is less than 100 meters away from Wynoochee Point, which lies in Mason County. | ||
| Island | Camano Island High Point | ||||
| Jefferson | Mount Olympus | Olympic Mountains | Ultra prominent | ||
| King | Mount Daniel | South Washington Cascades | |||
| Kitsap | Gold Mountain | Blue Hills | |||
| Kittitas | Mount Daniel | South Washington Cascades | |||
| Klickitat | Indian Rock | North Columbia Plateau | |||
| Lewis | Big Horn | South Washington Cascades | |||
| Lincoln | Lilienthal Mountain | North Columbia Plateau | |||
| Mason | Mount Stone | Olympic Mountains | |||
| Okanogan | North Gardner Mountain | North Cascades | |||
| Pacific | Pacific County High Point | Willapa Hills | |||
| Pend Oreille | Gypsy Peak | Selkirk Mountains | |||
| Pierce | Mount Rainier | South Washington Cascades | Ultra prominent Highest point in Washington state | ||
| San Juan | Mount Constitution | The second highest mountain on an ocean island in the contiguous 48 states | |||
| Skagit | Mount Buckner | North Cascades | |||
| Skamania | Mount Adams-West Slope | South Washington Cascades | Prior to its 1980 eruption, Mount St. Helens was | ||
| Snohomish | Glacier Peak | North Cascades | Ultra prominent | ||
| Spokane | Mount Spokane | Selkirk Mountains | |||
| Stevens | Abercrombie Mountain | Selkirk Mountains | Ultra prominent | ||
| Thurston | Quiemuth Peak | South Washington Cascades | |||
| Wahkiakum | Huckleberry Ridge | Willapa Hills | |||
| Walla Walla | Lewis Peak | Blue Mountains | |||
| Whatcom | Mount Baker | North Cascades | Ultra prominent | ||
| Whitman | Tekoa Mountain | North Columbia Plateau | |||
| Yakima | Mount Adams | South Washington Cascades | Ultra prominent |