The research is undertaken with several aims in mind. First, to analyze the local trade conducted in the Kingdom of Inderapura within the 17th-18th century CE. Second, to classify several types of local trade conducted under the patronage of the Kingdom of Inderapura in its effort to ascertain its position as the main patron of commerce on the west coast of Sumatera. One of the policies issued by the king of Inderapura to boost the kingdom’s commerce was not to burden the anchoring merchant ships with paying customs. Here lies the difference between the port of the Kingdom of Inderapura with other ports on the west coast of Sumatera. The article approaches the problem through maritime historical research method. It utilizes the Dutch colonial archives and the Tambo of the Kingdom of Inderapura as the primary sources. Besides that, the research also makes use of related books and scientific journals as secondary sources. To enrich and bring depth to its analysis, the research approaches the research question socio-economically. These sources, then, need to pass the internal and external criticism to validate its reliability. The final steps are synthesis and historiography (putting and arranging those facts into historical writing). The writers discover that there are three types of local trade conducted by the Kingdom of Inderapura along with the 17th-18th century CE: intra-island, inter-ports, and inter-islands trade.