Ephraim Bluff is a 425 m ice-free bluff in the south of Breznik Heights, Greenwich Island in the South Shetland Islands, Antarctica. The bluff is linked to Razgrad Peak to the north-northeast and separates the termini of Wulfila Glacier to the northwest and Zheravna Glacier to the east. It surmounts Doris Cove on the northwest.
The feature was charted and named 'Mount Ephraim' as early as 1820-22 by American sealers who used it as a lead mark for the nearby Yankee Harbour.