Chengcheng County (Chinese: 澄城县; pinyin: Chéngchéng Xiàn) is a county under the administration of the prefecture-level city of Weinan, in the central part of Shaanxi province, China. The county lies in the Guanzhong Plain, which has a population of about 390,000.

As of 2019, Chengcheng County is divided to 1 subdistrict and 9 towns.

35°16′30″N 109°48′50″E / 35.275°N 109.814°E / 35.275; 109.814