Nathaniel Pearce (14 February 1779 – 12 August 1820) was an explorer who spent many years in Abyssinia (present-day Ethiopia) and wrote a journal of his experiences.
He was born in East Acton near London, and was educated at private schools, but, proving wild and incorrigible, was apprenticed to a carpenter and joiner in Duke Street, Grosvenor Square. He soon ran away to sea, and on his return was apprenticed to a leather-seller, whom he left suddenly to enlist on the man-of-war HMS Alert. In May 1794 he was taken prisoner by the French; but after many attempts succeeded in escaping, and served again in the navy.
Many adventures followed. Deserting from the HMS Antelope in July 1804, he seems to have made his way to Mocha, Yemen and become a Muslim, but managed to reach, on 31 December 1804, the vessel that was conveying Viscount Valentia's mission to Abyssinia. After he arrived at Massawa on the Red Sea coast, he accompanied, in the summer of next year, Henry Salt as an English servant on his mission to the court of Ras Wolde Selassie of Tigray.
On Salt's departure in November, Pearce stayed behind in the service of the Ras. On more than one occasion he was compelled by jealous intriguers to quit the court, but by the autumn of 1807 he had made his position there secure. In 1808 he married the daughter of Sidee Paulus, a Greek. In 1810 he met Salt's second expedition, and escorted it from the coast and back. Pearce remained in Abyssinia till 1818, when he set out for Cairo on a visit to Salt. He reached Cairo in 1819, and, after a journey up the Nile, returned there and died in Alexandria from the results of exposure on 12 August 1820.