The town of Wasleys was established in an area known as the Mudla Wirra Forest. The name Mudla Wirra is aboriginal, Mudla meaning "implement" and Wirra meaning "forest". The town of Wasleys is now situated on an area first known as "Ridleyton" which was named after John Ridley, who laid out the village of Ridley in 1873. In 1869, the Peterborough railway line was built through the region and a railway station was erected on the land purchased by Josiah Wasley, one of the first settlers to the area. The township was advertised to attract people seeking good agricultural land as "Ridley Township - Wasleys Station". In time two townships were announced and called Ridleyton and Wasley. As the towns grew the name Ridleyton was discarded and the town became known as Wasleys. Early settlers soon made their mark on the history of the region. In 1843, John Ridley revolutionised the agricultural industry with the first "stripper machine". In the 1860s, a local farmer named Charles Mullen created a method of ploughing which was known as "Mullenising". Mullen invented an implement, used throughout Australia, which was the precursor of the stump-jump plough. During 1866–1877, pioneer farmer Richard Marshall succeeded in solving the "red rust" problem in wheat by crossbreeding various wheat varieties and improved soil conditions using bone meal on the land. After good crop returns, a student at Roseworthy College named Charles Deland, led a campaign in favour of fertilizer. In 1873, the township had been fully laid out and a local newspaper publicised the achievement in a short article about "Wasley" stating "There can be no question that this is an excellent locality for a township". On 12 April 1970, a bus collided with a passenger trainon the road from Wasleys to Gawler killing 17 people and injuring more than 40. Wasleys became a thriving centre and once operated three chaff mills. Although the chaff mills have ceased operating, the town is still a focal point for agriculture and farming livestock, and as reported in 85% of all residents were born in Australia, 10% in the UK, and the remaining 5% in other countries. In 2015, the Pinery bushfire burned through the township of Wasleys, gutting the lawn bowls club and post office.
