Wangi Power Station is a heritage-listed former coal-fired power station at Wangi Wangi, City of Lake Macquarie, New South Wales on Lake Macquarie. The power station operated between 1956 and 1986 and supplied electricity to New South Wales. It was once the largest in the state. The 12,000-square-metre (130,000 sq ft) building was listed on the New South Wales State Heritage Register on 2 April 1999.

John Joseph Cahill, also known as Joe Cahill or J. J. Cahill, was a long-serving New South Wales politician, railway worker, trade unionist and Labor Party Premier of New South Wales from 1952 to his death in 1959. Born the son of Irish migrants in Redfern, New South Wales, Cahill worked for the New South Wales Government Railways from the age of 16 before joining the Australian Labor Party. Being a prominent unionist organiser, including being dismissed for his role in the 1917 general strike, Cahill was eventually elected to the Parliament of New South Wales for St George in 1925.