Dick Sand, A Captain at Fifteen (French: Un capitaine de quinze ans) is a Jules Verne novel published in 1878.

Dick Sand is a fifteen-year-old boy serving on the schooner Pilgrim, a whaler that normally voyages across the Pacific in their efforts to find targets.

Several days into their journey northeast, the Pilgrim encounters a shipwreck, with only five survivors-negros (Tom, Actéon, Austin, Bat, and Hercules), plus a dog (Dingo), all of whom are brought onto the ship and offered passage to America.

It is as they get closer east that they encounter a whale; the captain and crew decide to hunt it, in an attempt to make some profit off the otherwise failed season.

Captain Hull reluctantly leaves Dick responsible for the ship in his absence, while the rest of the crew approaches the whale on a smaller boat.

However, while defending itself, the whale destroys the boat, killing the crew and leaving Dick in charge of a ship with no experienced sailors – only the shipwreck survivors are well enough to help him.

A man named Harris meets the group, assuring them they are on the Bolivian coast, and encouraging them to follow him into the jungle, saying he can lead them to a nearby city.

Dick realizes they are in Africa after the group hears a lion's roar and a horrified Tom – who had been enslaved in his youth – finds several implements.

Both groups are taken to the lands of the king of Kazoondé, an old, petty ruler who trades with slave traders – among them Harris, Negoro, and their chief, José Antonio Álvez – for European commodities.

Reunited with his friends again, the group encounters and joins a caravan of Portuguese traders who are going to the coast, where they take a ship that gets them to San Francisco.