Pingsi (Chinese: 平溪; Pinyin: Pingxi; Wade-Giles: Ping-Hsi; Tongyong Pinyin: Pingsi; historically spelled Pinghsi), is a rural township in the eastern part of Taipei County, Taiwan Province of the Republic of China. The source of the Keelung River is in Jingtong, which is inside the Pingsi Township. It was an important coal mining town in the early 20th century.
Pingsi is served by the Pingsi Line of Taiwan Railway Administration.