印度苦楝树（英语：Azadirachta indica），又称印度楝树、印度蒜楝、印度假苦楝、宁树（英语：Neem）、印度紫丁香（Indian lilac），楝科蒜楝属植物，分布于印度、缅甸、孟加拉、斯里兰卡、马来西亚与巴基斯坦等亚洲亚热带、热带气候地区。

它生长快速，可以达到15-20公尺高，少数甚至可以达到35-40公尺高。它是常青树，但在严重干旱时，它大部份、或全部的叶子会掉落。

印度苦楝具备杀虫、灭菌的功效，长期被人当成草药来使用。在阿育吠陀中就记载了它的疗效。

Azadirachta indica, also known as Neem, Nimtree, and Indian Lilac is a tree in the mahogany family Meliaceae. It is one of two species in the genus Azadirachta, and is native to India and the Indian subcontinent including Nepal, Pakistan, Bangladesh and Sri Lanka. It is typically grown in tropical and semi-tropical regions. Neem trees now also grow in islands located in the southern part of Iran. Its fruits and seeds are the source of neem oil.