This dataset is a market activity dataset, representing a combination of provincial 'limonite ore' markets within the southwestern region of China, i.e., the 'limonite ore' market group for the southwestern region. Transportation losses, transport vehicles, and transportation infrastructure are not included in this dataset; they are covered in the respective provincial market datasets. The southwestern region of China includes: Chongqing, Sichuan, Guizhou, Yunnan, and Xizang. Data references include the China Communications Yearbook, China Energy Statistics Yearbook, China Statistical Yearbook, and customs statistics from the General Administration of Customs.