Australian Kerosene Oil Company or 'A.K.O' mined and processed oil shale to produce kerosene, paraffin wax and candles, lubricating oil and greases, and other petroleum-based products, in New South Wales Australia. It is particularly associated with the site of its mine and works, at Joadja. At times, it also had other mining operations, at Airly and near Katoomba, and a soap and candle factory at Camellia. The company used the brand name 'Southern Cross' for its kerosene products.

Joadja is a historic town, now in ruins, in the Southern Highlands of New South Wales, Australia, in Wingecarribee Shire. The remnants of the town were added to the New South Wales State Heritage Register on 5 November 1999.