Harley-Davidson Motor Company（又译哈雷摩托车公司，NYSE：HOG，旧代号为HDI）是一间美国的摩托车制造商，根据地在威斯康辛州密尔瓦基。该公司销售专为公路巡航设计的重型摩托车（排气量超过750 cc）。哈雷机车有着独特的设计和出色的性能，并且带动称为「美式机车」（chopper）风格客制化重型摩托车的风潮。

Harley-Davidson吸引了一群忠实的品牌爱好者，，Harley-Davidson商标的授权收入约占了该公司营业额的5%（2004年时为4,100万美元） 。在2003年，Buell Motorcycle Company，成为Harley-Davidson全资持有的子公司，而就在同一年Harley-Davidson也迎接创立的一百周年。在2008年8月，Harley-Davidson买下意大利摩托车制造商MV Agusta。Harley-Davidson是美国警用摩托车的主要供应商。

Harley-Davidson, Inc. (H-D), or Harley, is an American motorcycle manufacturer, founded in Milwaukee, Wisconsin in 1903.

As one of two major American motorcycle manufacturers to survive the Great Depression (along with Indian), the company has survived numerous ownership arrangements, subsidiary arrangements (e.g., Aermacchi 1974-1978 and Buell 1987-2009), periods of poor economic health and product quality, as well as intense global competition — to become the world's fifth largest motorcycle manufacturer and an iconic brand widely known for its loyal following — with owner clubs and events worldwide as well as a company sponsored brand-focused museum.