The Dahan River (Chinese: 大漢溪; pinyin: Dàhàn Xī; Pe̍h-ōe-jī: Tāi-hàn-khe, also spelled Tahan) is a river in northern Taiwan. It originates in Hsinchu County and then flows through Taoyuan City and New Taipei City for 135 km, before it joins Xindian River in Taipei to form the Tamshui River. The upper reaches of the Dahan are also known as Takekan Creek (Chinese: 大嵙崁溪; Pe̍h-ōe-jī: Toā-kho-khàm-khe) or Taigang Creek (泰崗溪). An alternative historical name for the Dahan is the Shihmen River (石門溪).