Yiyuan or Yi Yuan may refer to:
Yiyuan County in Zibo, Shandong, China Hospital (Han novel) (医院; Yīyuàn), 2016 Chinese novel by Han Song Garden of Pleasance (怡园; Yí Yuán) in Suzhou, Jiangsu, China Arts Garden (藝園; Yì Yuán) in Sé, Macau, China Yiyuan Subdistrict, Daqing, Heilongjiang, China Yiyuan Subdistrict, Weihai, Shandong, China Yiyuan Subdistrict, Wuhan, Hubei, China Yi Yuan Mansion in Xiushui Township, Changhua County, Taiwan