Kate Leigh's Gang was a notorious criminal group in Sydney, Australia, during the early 20th century. Led by Kate Leigh, a prominent figure in the underworld, the gang was involved in various illegal activities, including bootlegging and prostitution. Kate was known for her fierce personality and played a significant role in the organized crime scene of the time. The gang operated during the 1920s and 1930s, often clashing with rival groups, such as the razor gangs. Their activities contributed to the violent crime wave in Sydney, leading to increased police attention. Kate Leigh's influence and the gang's notoriety made them a significant part of Sydney's criminal history.