Pingxi District (Chinese: 平溪區; pinyin: Píngxī Qū; Wade–Giles: P'ing2-hsi1 Ch'ü1; Pe̍h-ōe-jī: Pêng-khoe-khu, Pêng-khe-khu; also spelled Pinghsi), is a rural district in New Taipei, Taiwan.

The source of the Keelung River is in Jingtong, which is inside Pingxi District.

It was an important coal mining town in the early 20th century.

Its population of 4,253 as of February 2023 is the smallest among the districts of New Taipei City.

Pingxi is served by the Pingxi Line of Taiwan Railways, which includes: