翡翠科（学名Halcyonidae）在动物分类学上是鸟纲佛法僧目中的一个科。翡翠科是翠鸟亚目中最大的科，不同的学者将它分8至12个属、56至61个种。翡翠科的鸟是比较普遍的，虽然如此，如上所述，在分类学中对它的分类的争议还是很大的。

翡翠科可能是在印度尼西亚和马来群岛上演化出来的，随后逐渐普及到全世界。在亚洲和澳大利亚翡翠科的鸟最普及，在非洲和太平洋和印度洋的岛屿上也有出现。

The tree kingfishers or wood kingfishers, family Halcyonidae, are the most numerous of the three families of birds in the kingfisher group, with between 56 and 61 species in around 12 genera, including several species of kookaburras. The family appears to have arisen in Indochina and Maritime Southeast Asia and then spread to many areas around the world. Tree kingfishers are widespread through Asia and Australasia, but also appear in Africa and the islands of the Pacific and Indian Oceans, using a range of habitats from tropical rainforest to open woodlands.