Endangered species include:
| Common Name | Scientific Name |
| pygmy rabbit | Brachylagus idahoensis |
| fisher | Martes pennanti |
| gray wolf | Canis lupus |
| grizzly bear | Ursus arctos |
| sea otter | Enhydra lutris |
| killer whale | Orcinus orca |
| sei whale | Balaenoptera borealis |
| fin whale | Balaenoptera physalus |
| blue whale | Balaenoptera musculus |
| humpback whale | Megaptera novaeangliae |
| black right whale | Balaena glacialis |
| sperm whale | Physeter macrocephalus |
Columbian white-tailed
deer | Odocoileus virginianus leucurus |
| woodland caribou | Rangifer tarandus caribou |
| American white pelican | Pelecanus erythrorhynchos |
| brown pelican | Pelecanus occidentalis |
| sandhill crane | Grus canadensis |
| snowy plover | charadrius alexandrinus |
| upland sandpiper | Bartramia longicauda |
| spotted owl | Strix occidentalis |
| western pond turtle | Clemmys marmorata |
| leatherback sea turtle | Dermochelys coriacea |
| mardon skipper | Polites mardon |
Oregon silverspot
butterfly | Speyeria zerene hippolyta |
| Oregon spotted frog | Rana pretiosa |
| northern leopard frog | Rana pipiens |
| Taylor's checkerspot | Euphydryas editha taylori |
| Streaked horned lark | Eremophila alpestris strigata |
[Statutory Authority: RCW 77.12.047, 77.12.020. 06-04-066 (Order 06-09), § 232-12-014, filed 1/30/06, effective 3/2/06; 04-11-036 (Order 04-98), § 232-12-014, filed 5/12/04, effective 6/12/04. Statutory Authority: RCW 77.12.047, 77.12.655, 77.12.020. 02-11-069 (Order 02-98), § 232-12-014, filed 5/10/02, effective 6/10/02. Statutory Authority: RCW 77.12.040, 77.12.010, 77.12.020, 77.12.770, 77.12.780. 00-04-017 (Order 00-05), § 232-12-014, filed 1/24/00, effective 2/24/00. Statutory Authority: RCW 77.12.020. 98-23-013 (Order 98-232), § 232-12-014, filed 11/6/98, effective 12/7/98; 97-18-019 (Order 97-167), § 232-12-014, filed 8/25/97, effective 9/25/97; 93-21-026 (Order 616), § 232-12-014, filed 10/14/93, effective 11/14/93. Statutory Authority: RCW 77.12.020(6). 88-05-032 (Order 305), § 232-12-014, filed 2/12/88. Statutory Authority: RCW 77.12.040. 82-19-026 (Order 192), § 232-12-014, filed 9/9/82; 81-22-002 (Order 174), § 232-12-014, filed 10/22/81; 81-12-029 (Order 165), § 232-12-014, filed 6/1/81.]