Quantification of contemporary sediment and carbon accumulation within Oregon tidal saline wetlands will: (1) fill a critical knowledge gap, and (2) naturally test without complicating variables whether sea level rise or sediment supply primarily control wetland growth. Here we measure vertical accretion rates and carbon burial rates in three Oregon estuaries – Youngs Bay, Tillamook Bay, and the Salmon River Estuary – of differing relative sea level rise rates (0.28 ± 0.44, 1.8 ± 0.4, and 2.2 ± 0.3 mm yr-1, respectively) and sediment loads (39, 160, and 24 t yr-1, respectively).