Leptomischus is a genus of plants in the family Rubiaceae, which is most abundant in the tropics and includes many economically important members used for purposes such as medicine, horticulture, and food production. Leptomischus is a typically Asian genus found only in Myanmar (one species), India (three species), Vietnam (five species), and China (five species). However, it is a poorly known and small genus, with only 10 species currently recognized.