Nephelomys childi is a species of rodent in the genus Nephelomys of family Cricetidae. The type locality is at Bogotá, Colombia, and the type locality of its junior synonym, oconnelli, is at a place known as Buenavista, about 50 miles (80 km) southeast of Bogotá. It was named after Mr. George D. Child, who assisted in obtaining the type series.