栾树属（学名：Koelreuteria）是无患子科下的一个属，为落叶灌木至小乔木植物。该属共有4种，一种产自斐济群岛、一种产自**、两种产自中国。

Koelreuteria /kɛlrᵿˈtɪəriə/ is a genus of three species of flowering plants in the family Sapindaceae, native to southern and eastern Asia.

They are medium-sized deciduous trees growing to 10–20 m (33–66 ft) tall, with spirally arranged pinnate or bipinnate leaves. The flowers are small and yellow, produced in large branched panicles 20–50 cm (8–20 in) long. The fruit is a three-lobed inflated papery capsule 3–6 cm long, containing several hard nut-like seeds 5–10 mm diameter.