The boy was found on Wednesday in the Kalehe area of South Kivu - a province that borders Rwanda and Burundi - with his head and legs missing, according to local government official Archimede Karhebwa.
Juvenal Lushule, who works for an albino association in South Kivu, said that 18 albinos had been killed in similar circumstances in the province since 2009.
Ten albino graves had also been violated during that period, according to Lushule, and there were 22 kidnapping attempts.
As in several other African countries, albinos in the DRC are sometimes targeted due to the belief that their body parts can be used in magic rituals to bring fame and fortune.
Albinism, caused by a lack of melanin, the pigment that colors skin, hair and eyes, is a genetic condition that affects hundreds of thousands of people worldwide, especially in Africa.