Winslow Rock is a rock close off the east side of Lavoisier Island, Biscoe Islands. Mapped from surveys by Falkland Islands Dependencies Survey (FIDS) (1958–59). There is a small penguin rookery on this rock, which provides the only known landing place on the east side of Lavoisier Island. Named by United Kingdom Antarctic Place-Names Committee (UK-APC) for Charles E.A.