Tapanuli

Tapanuli (or, in obsolete Dutch spelling, Tapanoeli) may refer to:
 * Central Tapanuli Regency, North Sumatra, Indonesia
 * North Tapanuli Regency, North Sumatra, Indonesia
 * South Tapanuli Regency, North Sumatra, Indonesia
 * Tapanuli orangutan, a species of orangutan
 * Tapanoeli Residency, a colonial Dutch administrative division consisting of most of the western coast of modern North Sumatra province.
 * Sibolga Bay, formerly called in Dutch Baai van Tapanoeli, North Sumatra
 * SS Tapanoeli, a Dutch steam merchant ship from Rotterdam that was active from 1924, primarily in connection to Batavia, Dutch East Indies, which was sunk by German U-boats on 17 March 1941
 * A World War II military command associated with its peer command of Sumatra
 * Tapanuli fever, a fictional illness from the Sherlock Holmes story The Adventure of the Dying Detective