Yanco is a village with a population of 432 in Leeton Shire in south western New South Wales, Australia. Yanco is a Wiradjuri aboriginal …Yanco is a village with a population of 432 in Leeton Shire in south western New South Wales, Australia. Yanco is a Wiradjuri aboriginal language word meaning the sound of running water. Yanco is located 3 kilometres from Leeton along Irrigation Way. Yanco is home to the Powerhouse Museum, McCaughey Park, Murrumbidgee Rural Studies Centre and Yanco Agricultural High School. Murrumbidgee Irrigation builds the Roach’s Surge Reservoir near Yanco, holding up to 5 million tonnes of water.