Barnett Abrahams (1831 – 15 November 1863) was the Principal of Jews' College, and a Dayan (rabbinic judge) in London.
Abrahams was educated by his father, and later by Chief Rabbi Nathan Marcus Adler.
In 1849 he joined the yeshiva at Bevis Marks Synagogue (Spanish and Portuguese congregation).
He had 6 children; Joseph and Moses became Jewish ministers, and Israel became an author and teacher.
In 1858, on the resignation of Louis Loewe as headmaster of Jews' College, Abrahams succeeded him while continuing to carry out his religious duties.