蜜蜂（学名：Apis）是一种会飞行采食花粉和花蜜并酿造蜂蜜的群居昆虫，属于蜂族。与蚂蚁和黄蜂为近亲，于膜翅目。

蜜蜂源自于亚洲与欧洲，由英国人与西班牙人带到美洲。有化石表明，蜜蜂在1.3亿年前的早白垩纪已经出现。群体中有蜂后、工蜂和雄蜂（Drone）三种类型的蜜蜂，群体中有一只蜂后（有些例外情形有两只蜂后），1万到15万工蜂，500到1500只雄蜂。蜜蜂为取得食物不停地工作，白天采蜜、晚上酿蜜，同时替果树完成授粉任务，为农作物授粉的重要媒介。

瓦螨对蜜蜂造成严重的危害。蜜蜂的主要天敌有胡蜂、蟾蜍、蛾、螟虫及其他食虫动物。

Apidae is the largest family within the superfamily Apoidea, containing at least 5700 species of bees. The family includes some of the most commonly seen bees, including bumblebees and honey bees, but also includes stingless bees (also used for honey production), carpenter bees, orchid bees, cuckoo bees, and a number of other less widely-known groups. Many are valuable pollinators in natural habitats and for agricultural crops.