地产发展商（英语：Property developer），简称地产商，又称地产开发公司，地产公司等。它不是地产代理公司之类的中介人，而是房地产或土地公契持有人，继政府后的土地第二拥有人。

地产发展商不是小本经营的中小企。他们必须有大量的资本投入，例如用于竞投拍卖的土地，之后向政府当局报上计划书，申请建筑工程，获批后把建造工程外判给建筑公司，不论该地产发展商旗下是否有承建公司，品质控制、平顶、申请入伙纸、公关、市场推广、住宅、商场、写字楼和待价而沽等等，都是大型投资活动。

为了减少投资额，利润极大化，地产商各出奇谋，有合法也有非法的，例如卖楼花、「官商合作」平价收地、收旧楼重建、投地之后更改地积比率、屏风楼、缩水楼、换地权益书和丁屋等。

Real estate development, or property development, is a multifaceted business process, encompassing activities that range from the renovation and re-lease of existing buildings to the purchase of raw land and the sale of developed land or parcels to others. Real estate developers are the people and companies who coordinate all of these activities, converting ideas from paper to real property. Real estate development is different from construction, although many developers also manage the construction process.