Walcha (/ˈwɒlkə/) is a town at the south-eastern edge of the Northern Tablelands, New South Wales, Australia. The town serves as the seat of Walcha Shire. Walcha is located 425 kilometres (264 mi) by road from Sydney at the intersection of the Oxley Highway and Thunderbolts Way. The Apsley River passes through the town to tumble over the Apsley Falls before joining the Macleay River further on. Originally the river caused flooding in the town prior to a levee bank being constructed and saving the town from more floods. At the 2016 census, Walcha had a population of 1,451 people.