Bernard Christian Steiner (August 13, 1867 in Guilford, Connecticut – January 12, 1926) was a United States educator, librarian and jurist.

He prepared for college at the academy of Frederick, Maryland, then attended Yale, where he graduated with an A.B.

He was a Fellow in history at Johns Hopkins, 1890–91 and received a PhD there in 1891.

He occupied this position for the rest of his life, and to it he devoted his primary attention, his motto being "The Library is the continuation school of the people", which motto however did not always ring true with his patrons, and was the source of some friction.

He was a Presbyterian, and was survived by a son and his spouse, Ethel Simes Mulligan Steiner.