Pingtang County (Chinese: 平塘县; pinyin: Píngtáng Xiàn) is a county in the Qiannan Buyei and Miao Autonomous Prefecture of Guizhou province, China, bordering Guangxi to the south.

It is a high mountain valley and is inhabited mainly by members of the Buyei and Miao ethnic minorities, who together make up 55% of the county's population.

[1] The county's area is 2,799.08 square km and at the 2010 Census its population was 228,560.

The Five Hundred Meter Aperture Spherical Telescope (FAST) is located in the southwestern part of Pingtan County, near its Kedu and Tangbian Towns and Dongjia Township of the adjacent Luodian County.

Pingtang County is divided into 1 subdistrict, 9 towns and 1 ethnic township:[2] The world's largest filled-aperture radio telescope, Five-hundred-meter Aperture Spherical Telescope (FAST) is located in the Dawodang, a natural sinkhole in Pingtang.