Mashan may refer to:
China Mashan County (马山县), Guangxi Mashan District (麻山区), Jixi, Heilongjiang Subdistricts (马山街道) Mashan Subdistrict, Wuxi, in Binhu District, Wuxi, Jiangsu Mashan Subdistrict, Chaoyang, Liaoning, in Longcheng District Mashan Subdistrict, Yantai, in Laishan District, Yantai, Shandong
Towns Mashan, Jiangxi (麻山镇), in Xiangdong District, Pingxiang Written as "马山镇": Mashan, Meitan County, Guizhou Mashan, Hubei, in Jingzhou District, Jingzhou Mashan, Shandong, in Changqing District, Jinan Mashan, Zhejiang, in Yuecheng District, Shaoxing
Townships Mashan Township, Heng County (马山乡), Guangxi Mashan Township, Liucheng County (马山乡), Guangxi Mashan Township, Guizhou (麻山乡), in Wangmo County
Iran Mashan, Iran, a village in Sistan and Baluchestan Province, Iran
South Korea Masan (馬山市), former municipality in South Gyeongsang Province, South Korea, merged in July 2010 with Changwon and Jinhae into Changwon City
Taiwan Mashan Broadcasting and Observation Station, Jinsha (Kinsha), Kinmen (Qumeoy), Taiwan (ROC)
Other Mashan Miao, the dialect of the Miao language spoken around Mashan Township, Guizhou