Otto Wilhelm Harrassowitz (December 18, 1845, in La Guayra, Venezuela – June 24, 1920 in, Gaschwitz near Leipzig) was a German book seller and publisher.
His business, Otto Harrassowitz GmbH & Co.
KG, became an important book vendor for academic and research libraries beginning in the 19th century, and survives in that role today.
A subsidiary, Harrassowitz Verlag (Harrassowitz Publishing House), is an academic publishing company.