Britannica Sources used in this answer

Which ape family includes orangutans and humans?

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An illustration of a female Bornean orangutan (Pongo pygmaeus) with long reddish-brown fur, hanging from tree branches with one arm extended upward and one leg hooked over a branch. A scale bar at the bottom shows lengths of 30 centimeters and 12 inches for size reference. — orangutan Female orangutans (*Pongo*) have the longest breeding interval of any mammal, giving birth on average once every eight years.

Orangutans and humans are both included in the family Hominidae.12

While these species were historically placed in separate families, modern morphological and molecular studies have led scientists to group humans and all great apes—including orangutans, gorillas, chimpanzees, and bonobos—within the same zoological family, Hominidae. Within this family, orangutans are classified in the subfamily Ponginae, while humans and African great apes are placed in the subfamily Homininae.134