Ruicheng County (simplified Chinese: 芮城县; traditional Chinese: 芮城縣; pinyin: Ruìchéng Xiàn) is under the administration of the Yuncheng City, in the southwest of Shanxi province, China.

It is the southernmost county-level division of Shanxi, with the Yellow River demarcating its border with the provinces of Henan to the south and Shaanxi to the west.

Ruicheng is home to Yongle Gong (永乐宫; 永樂宮; Yǒnglè gōng; 'Palace of Eternal Joy'), a Taoist temple complex noted for the wall paintings inside its three main halls.

It was moved to Ruicheng in 1959 to preserve it when the Sanmenxia Dam was built, which was expected to put the town of Yongle, the previous location of the temple, under water.

Apples are to be found in abundance in Ruicheng, being the most popular variety of fruit grown by local farmers.