捐赠（英文：Donation），是作为公共或慈善用途之赠与或捐献，目的有多种。捐赠是施恩，付出自己所有，例如金钱、物资、服务、身体器官、时间、名誉等，去赞助受惠者，例如慈善机构、弱势社区等。

宗教角度，捐赠行为是公德的积蓄，有分「阴德」和「明德」。 阴德是施恩不扬名，多以「无名氏」自称。 阴德曾经给歌颂为「高尚情操」，相对于有目的捐赠。 明德是行善者部分为扬名，目的是换取慈善家、MBE的称号，或以学校、建筑物、地方等命名为荣，小则为换取慈善演唱会、晚宴、餐舞会入场赠券、限量版纪念品、感谢状颁奖礼、免税额等。

A donation is a gift given by physical or legal persons, typically for charitable purposes and/or to benefit a cause. A donation may take various forms, including cash offering, services, new or used goods including clothing, toys, food, and vehicles. It also may consist of emergency, relief or humanitarian aid items, development aid support, and can also relate to medical care needs as i.e. blood or organs for transplant. Charitable gifts of goods or services are also called gifts in kind.