Indonesia has been among the state’s top ten trading partners for several years. In 2015‑16, it ranked seventh with total trade of $4.1 billion. The value of Western Australia’s exports to Indonesia was $1.9 billion while the value of imports from Indonesia was $2.2 billion.

Indonesia is Western Australia’s largest export market for wheat and second largest for crude petroleum. Specialised machinery, petroleum oils and gold were the top imports from Indonesia in 2015‑16.

Western Australia was one of the first Australian states to establish its own representative office in Indonesia. Opening in 1992, Western Australia’s Trade Office has developed strong relationships with local contacts and customers. This has been crucial in assisting many Western Australian companies penetrate the Indonesian market.

In August 1990, the Western Australian Government and East Java signed a Memorandum of Understanding to formally establish a Sister State Relationship. The relationship has led to exchanges in the areas of food and agriculture, sport, education, disability services and government administration as well as parliamentary delegation visits.

The Department of State Development  has supported a Western Australia Trade Office in Indonesia since it opened in 1992.