Samsung Galaxy S4是韩国三星电子于2013年推出的新一代旗舰型智能手机，是Samsung Galaxy S 系列的第四代。手机重量只有130克， 刚推出市面被誉为全球最轻5寸以上的智能平板手机。

三星电子于2013年3月14日在纽约时代广场举办的 Samsung Unpacked 2013 Episode 1 上正式发布。同年4月开始于155个国家发售。

根据三星电子公布的数据，截至2013年5月22日，Galaxy S4在全球共出货一千万支，目前已知销售量4000万支。而Galaxy S4同期的最大竞争对手是Apple iPhone 5及HTC One (M7)。

The Samsung Galaxy S4 is an Android smartphone produced by Samsung Electronics and was first shown publicly on March 14, 2013 at Samsung Mobile Unpacked in New York City. It is the successor to the Galaxy S III which maintains a similar design, but with upgraded hardware and an increased focus on software features that take advantage of its hardware capabilities—such as the ability to detect when a finger is hovered over the screen, and expanded eye tracking functionality. A hardware variant of the S4 became the first smartphone to support the emerging LTE Advanced mobile network standard.