Loranga, Masarin och Dartanjang is a Swedish children's novel written by Barbro Lindgren and published in 1969.

Out in the woodshed lives Masarin's grandfather, Dartanjang, who is hypochondriac (and suffering from slight dementia).

Loranga, constantly wearing a robe and a floral tea cozy on his head, is a childish and irresponsible bohemian.

Therefore, Masarin is usually the responsible one; for example, he is the one taking care of his great-grandfather who thinks he is a cuckoo and lives at the top of a pine tree in the forest.

Other characters in the book are Gustav the Thief, the Angry Old Man and the Hot Dog Vendor.