Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Coles Corner | Populated Place | 608 | Chelan | 47 45 22 N | 120 44 21 W |
| Colfax | Populated Place | 607 | Whitman | 46 52 49 N | 117 21 52 W |
| Colfax Cemetery | Cemetery | 721 | Whitman | 46 53 21 N | 117 21 02 W |
| Colfax Golf and Country Club | Locale | 602 | Whitman | 46 54 19 N | 117 20 37 W |
| Colfax High School | School | 594 | Whitman | 46 53 33 N | 117 21 38 W |
| Colfax Little League Park | Park | 601 | Whitman | 46 54 05 N | 117 21 01 W |
| Colfax Peak | Summit | 2840 | Whatcom | 48 46 16 N | 121 50 39 W |
| Colin Creek | Stream | | King | 47 43 27 N | 122 02 53 W |
| Collard Woods | Woods | 25 | Thurston | 47 00 07 N | 122 39 01 W |
| College Place | Populated Place | 244 | Walla Walla | 46 02 57 N | 118 23 18 W |
| College Place Elementary School | School | -3 | Snohomish | 47 48 47 N | 122 20 04 W |
| College Place Middle School | School | 128 | Snohomish | 47 48 40 N | 122 20 04 W |
| College Way Center | Locale | 22 | King | 47 18 54 N | 122 12 51 W |
| Collier Coulee | Valley | | Franklin | 46 43 19 N | 118 22 50 W |
| Collins | Locale | 50 | Skamania | 45 41 54 N | 121 44 10 W |
| Collins Canyon | Valley | | Douglas | 47 54 34 N | 119 39 32 W |
| Collins Creek | Stream | | Skamania | 45 41 55 N | 121 43 39 W |
| Collins Creek | Stream | | Whatcom | 48 56 12 N | 122 14 41 W |
| Collins Elementary School | School | 142 | Pierce | 47 08 23 N | 122 22 02 W |
| Collins Lake | Lake | 127 | Mason | 47 26 13 N | 122 59 09 W |
| Collins Point | Cape | 26 | Skamania | 45 41 49 N | 121 44 14 W |
| Collins School | School | 99 | King | 47 39 55 N | 122 11 27 W |
| Collins School | School | 62 | Thurston | 46 59 05 N | 122 43 47 W |
| Collins Spring | Spring | 370 | Kittitas | 47 09 33 N | 120 01 39 W |
| Colman Docks | Locale | 1 | King | 47 36 06 N | 122 20 18 W |
| Colman Elementary School | School | 39 | King | 47 35 21 N | 122 18 03 W |
| Colman Park | Park | 23 | King | 47 35 09 N | 122 17 21 W |
| Colman Pool | Locale | 4 | King | 47 31 50 N | 122 24 04 W |
| Colockum Creek | Stream | | Chelan | 47 17 58 N | 120 05 21 W |
| Colockum Game Range Headquarters | Locale | 255 | Chelan | 47 15 48 N | 120 06 08 W |
| Colockum Pass | Gap | 1631 | Kittitas | 47 11 57 N | 120 16 37 W |
| Colockum Research Unit Washington State University | School | 628 | Chelan | 47 16 11 N | 120 11 49 W |
| Colockum State Wildlife Area | Park | 1709 | Kittitas | 47 14 22 N | 120 18 49 W |
| Colonel Bob | Summit | 1278 | Grays Harbor | 47 29 19 N | 123 44 49 W |
| Colonel Bob Lookout | Locale | 1218 | Grays Harbor | 47 29 19 N | 123 44 16 W |
| Colonel Bob Wilderness | Reserve | 1170 | Grays Harbor | 47 29 29 N | 123 44 25 W |
| Colonel Shelter (historical) | Locale | 595 | Clallam | 47 58 18 N | 123 05 50 W |
| Colonial Creek | Stream | | Whatcom | 48 41 32 N | 121 06 01 W |
| Colonial Creek Campground | Locale | 547 | Whatcom | 48 41 54 N | 121 05 39 W |
| Colonial Glacier | Glacier | 1896 | Whatcom | 48 39 43 N | 121 08 20 W |
| Colonial Peak | Summit | 2255 | Whatcom | 48 39 41 N | 121 07 16 W |
| Colonnade | Cliff | 1761 | Pierce | 46 51 53 N | 121 51 06 W |
| Colony Creek | Stream | | Skagit | 48 35 48 N | 122 25 11 W |
| Colquhoun Peak | Summit | 1507 | King | 47 07 44 N | 121 27 41 W |
| Colquhoun Peak Lookout | Locale | 1507 | King | 47 07 44 N | 121 27 41 W |
| Colton | Populated Place | 782 | Whitman | 46 34 05 N | 117 07 43 W |
| Colton Elementary and High School | School | 779 | Whitman | 46 33 60 N | 117 07 53 W |
| Columbia | Populated Place | 26 | King | 47 33 50 N | 122 16 31 W |
| Columbia | Populated Place | 168 | Whatcom | 48 58 01 N | 122 09 47 W |
| Columbia Adventist Academy | School | 86 | Clark | 45 45 33 N | 122 33 29 W |
| Columbia Ag 2 Airport | Airport | 216 | Franklin | 46 22 49 N | 118 59 18 W |
| Columbia Ag Airport | Airport | 160 | Franklin | 46 17 32 N | 118 58 59 W |
| Columbia Basin Community College | School | 126 | Franklin | 46 15 02 N | 119 07 14 W |
| Columbia Basin Hospital | Hospital | 404 | Grant | 47 18 47 N | 119 32 44 W |
| Columbia Basin Hospital Heliport | Airport | 404 | Grant | 47 18 51 N | 119 32 51 W |
| Columbia Beach | Populated Place | 0 | Island | 47 58 13 N | 122 21 05 W |
| Columbia Canal | Canal | 111 | Benton | 46 14 31 N | 119 15 47 W |
| Columbia Canal Number 1 | Canal | 121 | Benton | 46 10 38 N | 119 05 33 W |
| Columbia Canal Number 2 | Canal | 110 | Benton | 46 11 23 N | 119 03 47 W |
| Columbia Canal Number 3 | Canal | 114 | Benton | 46 09 36 N | 119 04 36 W |
| Columbia Center | Locale | 978 | Garfield | 46 21 41 N | 117 33 20 W |
| Columbia County | Civil | 622 | Columbia | 46 18 00 N | 117 56 04 W |
| Columbia County Courthouse | Building | 492 | Columbia | 46 19 17 N | 117 58 46 W |
| Columbia Crest | Ridge | 4355 | Pierce | 46 51 10 N | 121 45 37 W |
| Columbia Crest Elementary School | School | 433 | Pierce | 46 45 15 N | 122 06 34 W |
| Columbia Crest Winery Airport | Airport | 200 | Benton | 45 57 22 N | 119 37 12 W |
| Columbia Elementary School | School | 240 | Chelan | 47 25 04 N | 120 19 08 W |
| Columbia Elementary School | School | 319 | Douglas | 47 57 60 N | 118 59 09 W |
| Columbia Elementary School | School | 33 | King | 47 33 29 N | 122 17 13 W |
| Columbia Elementary School | School | 114 | Walla Walla | 46 12 01 N | 119 00 40 W |
| Columbia Elementary School | School | 22 | Whatcom | 48 45 49 N | 122 29 33 W |
| Columbia Glacier | Glacier | 1614 | Snohomish | 47 57 44 N | 121 20 52 W |
| Columbia Heights | Populated Place | 102 | Cowlitz | 46 09 51 N | 122 56 29 W |
| Columbia Heights Christian Academy | School | 118 | Cowlitz | 46 10 07 N | 122 56 42 W |
| Columbia Heights Elementary School | School | 86 | Cowlitz | 46 09 21 N | 122 56 19 W |
| Columbia High and Elementary School | School | 501 | Stevens | 48 07 12 N | 118 12 10 W |
| Columbia High School | School | 240 | Klickitat | 45 44 27 N | 121 29 39 W |
| Columbia High School | School | 123 | Walla Walla | 46 13 27 N | 118 59 27 W |
| Columbia Hills | Range | 798 | Klickitat | 45 44 24 N | 120 47 09 W |
| Columbia Lateral | Canal | 267 | Chelan | 47 28 41 N | 120 20 13 W |
| Columbia Memorial Gardens | Cemetery | 107 | Franklin | 46 13 45 N | 119 07 22 W |
| Columbia Middle School | School | 113 | Walla Walla | 46 12 01 N | 119 00 36 W |
| Columbia Mountain | Summit | 2029 | Ferry | 48 37 13 N | 118 28 55 W |
| Columbia Mountain Lookout | Locale | 2022 | Ferry | 48 37 15 N | 118 28 55 W |
| Columbia National Wildlife Refuge | Park | 233 | Grant | 46 51 04 N | 119 32 12 W |
| Columbia Park | Park | 65 | King | 47 33 27 N | 122 16 07 W |
| Columbia Park (historical) | Park | 104 | Benton | 46 14 08 N | 119 12 19 W |
| Columbia Park Dam | Dam | 108 | Benton | 46 13 11 N | 119 08 28 W |
| Columbia Peak | Summit | 2069 | Snohomish | 47 57 42 N | 121 21 40 W |
| Columbia Plateau | Plain | 163 | Benton | 45 59 58 N | 119 00 05 W |
| Columbia Point | Cape | 104 | Benton | 46 15 36 N | 119 14 24 W |
| Columbia Point Marina Park | Park | 110 | Benton | 46 15 46 N | 119 15 15 W |
| Columbia Quarry | Mine | 470 | Pacific | 48 38 30 N | 118 07 23 W |
| Columbia Ridge Elementary School | School | 404 | Grant | 47 19 01 N | 119 32 21 W |
| Columbia River | Locale | 222 | Douglas | 47 18 27 N | 120 04 58 W |
| Columbia River High School | School | 54 | Clark | 45 41 39 N | 122 40 44 W |
| Columbia School | School | 16 | Clark | 45 34 43 N | 122 20 48 W |
| Columbia School | School | 466 | Columbia | 46 17 28 N | 118 01 19 W |
| Columbia Shopping Center | Locale | 138 | Benton | 46 13 36 N | 119 13 32 W |
| Columbia Square | Locale | 141 | Benton | 46 13 25 N | 119 13 34 W |
| Columbia Substation | Locale | 279 | Douglas | 47 17 43 N | 120 04 34 W |
| Columbia Tie Mill Pond | Reservoir | 457 | Clark | 45 57 23 N | 122 25 46 W |
| Columbia Tungsten Mine | Mine | 1124 | Stevens | 48 15 11 N | 118 04 59 W |
| Columbia Valley | Valley | | Whatcom | 48 55 19 N | 122 08 21 W |
| Columbia Valley Gardens | Populated Place | 5 | Cowlitz | 46 09 27 N | 122 58 29 W |
| Columbia Valley Gardens Elementary School | School | 5 | Cowlitz | 46 09 17 N | 122 57 26 W |
| Columbian White-Tailed Deer National Wildlife Refuge | Park | 3 | Wahkiakum | 46 14 50 N | 123 24 49 W |
| Colville | Populated Place | 493 | Stevens | 48 32 48 N | 117 54 20 W |
| Colville Air Force Station (historical) | Military (Historical) | | Stevens | 48 35 28 N | 117 35 18 W |
| Colville Gun Club | Locale | 663 | Stevens | 48 32 31 N | 117 50 46 W |