Oyster biomass data is described for defined stocks and are coincident with subdivision of the surveyed area in a north-south direction as follows: (A) Pocomoke and Tangier Sounds, (B) Great Wicomico River, (C) Rappahannock River, (D) Piankatank River, (E) Mobjack Bay, (F) York River, (G) James River, and (H) Elizabeth and Lafayette Rivers.