Ernst Steiger (October 4, 1832 - August 2, 1917) was an American bookseller, publisher and bibliographer.

He was apprenticed on February 14, 1848 for five years, to Bernhard Hermann, a bookseller in Leipzig, eventually rising from errand boy to office clerk.

Steiger spoke not only his native German, but also English, French and Spanish, which he had learned as by means of constantly seeking conversations in those languages in his leisure time; and acquired a smattering of several others.

Steiger was the author of Der Nachdruck in Nordamerika (New York, 1860); Das Copyright-Law in den Vereinigten Staaten (1869); and Periodical Literature, a bibliography (1873), and The Periodical Literature of the United States of America: With Indexes and Appendices, as well as the Steiger's Educational Directory series.

[1][2] He died August 2, 1917, at his summer home at Sea Gate, Long Island.