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| Y Marsh (2) | Y-Marsh (1) | Yachats (9) |
| Yachats (Or.) (25) | Yachats (Or.), Fogarty Creek, Boiler Bay, Yachats Beach, Yachats Smelt Sands, Tokatee Klootchman, Gooseneck barnacle = Pollicipes polymerus,, crustaceans, barnacles, recreational fisheries – shellfish, commercial fisheries – shellfish, theses (1) | Yachats (Or.), Northern striped dogwinkle = Nucella ostrina, Acorn barnacle = Balanus glandula, Bay mussel = Mytilus trossulus, feeding behavior, molluscs, bivalves, gastropods, carbon, diet, isotopes, population biology, theses (1) |
| Yachats (Or.), Western gull = Larus occidentalis, feeding behavior, nutrition, human impacts, geographic distribution, temporal distribution (1) | Yachats Basalt (8) | Yachats Basalt, Umpqua River Basin, aquatic invertebrates, echinoderms, geology, paleosciences, crinoids, fossils (1) |
| Yachats Beach (1) | Yachats ocean road Wayside (1) | Yachats Ocean State Wayside (2) |
| Yachats Park (1) | Yachats Poiint (1) | Yachats Rive (1) |
| Yachats River (165) | Yachats River Basin (3) | Yachats River estuary (19) |
| Yachats River Road (1) | Yachats River, Alsea River, Yaquina Bay, Siletz River, Native Americans, anthropology, economics, historical, human impacts, land ownership, Coast Indian Reservation (1) | Yachats River, human impacts, climate, habitats, land use, salinity, sea level, wetlands, wetland vegetation, zonal distribution (3) |
| Yachats River, Northwestern salamander = Ambystoma gracile, spotted salamander = Ambystoma maculatum, Oophila amblystomatis, amphibians, algae, symbiosis, genetics, physiology (1) | Yachats State Park (3) | Yachats State Parks (1) |
| Yachats State Recreational Park (1) | Yager Cr. (1) | Yager Creek (2) |
| Yaguina (Or.) (1) | Yamhill County (1) | Yamhill Formation (2) |
| Yamhill River (2) | Yangtze River (1) | Yaqiuna Bay (1) |
| Yaquina (3) | Yaquina (Or.) (3) | Yaquina Bay (1678) |
| Yaquina Bay Bar (25) | Yaquina Bay Bridge (50) | Yaquina Bay Estuary (3) |
| Yaquina Bay Fish Company (1) | Yaquina Bay Fisheries Laboratory (16) | Yaquina Bay Lighthouse (2) |
| Yaquina Bay Marina (1) | Yaquina Bay Molluscan Broodstock Repository (1) | Yaquina Bay Oyster Farm (1) |
| Yaquina Bay south jetty (2) | Yaquina Bay, Alsea Bay, Softshell clam = Mya arenaria, genetics, population biology, geographic distribution, (1) | Yaquina Bay, Crassostrea gigas = Pacific oyster, general, aquatic invertebrates, molluscs, bivalves, catch statistics (1) |
| Yaquina Bay, Hatfield Marine Science Center, Oregon Oyster Farms, Netarts Bay, Whiskey Creek, Pacific oyster = Crassostrea gigas, Olympia oyster=Ostrea lurida (Ostrea conchaphila), aquaculture, molluscs, bivalves, oysters, ocean acidification, human imp (1) | Yaquina Bay. Yaquina River (2) | Yaquina City (19) |
| Yaquina Falls (4) | Yaquina Formation (4) | Yaquina Hatchery (8) |
| Yaquina Head (68) | Yaquina Head Lighthouse (1) | Yaquina Head Outstanding Natural Area (1) |
| Yaquina Indians (3) | Yaquina Reef (1) | Yaquina Rive (1) |
| Yaquina Rive Basinr (1) | Yaquina River (570) | Yaquina River Basin (144) |
| Yaquina River Basin, Coquille River estuary, Yaquina River, general, biological, general ecosystem description, terrestrial mammals, terrestrial vegetation, birds, abundance, geographical distribution, climate (1) | Yaquina River Estuary (16) | Yaquina River, Siuslaw River, Umpqua River, Coquille river, hatcheries, hatchery salmonids, Coho salmon = Oncorhynchus kisutch, Chinook salmon = Oncorhynchus tshawytscha (1) |
| Yaquina Sandstone (1) | Yauqina River (1) | Yeager Creek (1) |
| yellow bullhead = Ameiurus natalis (1) | Yellow Creek (3) | yellow floating heart = Nymphoides peltate (1) |
| Yellow perch = Perca flavescens (2) | yellow shore crab = Hemigrapsus oregonensis (2) | yellow shore crab=Hemigrapsus oregonensis (8) |
| yellowtail rockfish = Sebastes flavidus (2) | Yersinia ruckeri (2) | Yew Creek (1) |
| Yoncalla (1) | Yoncalla Creek (2) | Yoncalla Indians (1) |
| Yonna Formation (1) | Young Creek (1) | Youngs Bay (4) |
| Youngs River estuary, Nehalem Bay, Tillamook Bay, Netarts Bay, Salmon River estuary, Alsea Bay, Coquille River estuary, salt marsh, wetlands, sediments, climate change, sea levels, carbon, (1) | | |
