- Ouyen is a small town located in the Mallee region of Victoria, Australia. It is situated approximately 400 kilometers northwest of Melbourne and 110 kilometers southeast of Mildura. Ouyen is known for its agricultural industry, particularly its production of grain crops, sheep, and cattle. The town has a population of around 1,000 residents and offers amenities such as schools, healthcare services, and recreational facilities. Ouyen is also a popular stop-off point for travelers along the Calder Highway and is known for its annual Mallee Machinery Field Days, which showcases agricultural machinery and products.