The General Dynamics F-111C was a medium-range and tactical strike aircraft and interdictor developed by to meet Royal Australian Air Force (RAAF) requirements from 1973 to 2010. An interdictor is an attack aircraft operating with the express intent of interdicting enemy military targets preventing or delaying enemy forces and supplies from reaching the battlefront.

The Australian government ordered 24 F-111Cs in 1963 to equip the RAAF with the capability to project long range influence. The variant was based on the F-111A design including longer wings and strengthened undercarriage. Due to extended technical issues, the aircraft were not delivered until 1973, a decade behind schedule. During 1979 and 1980 four of these aircraft were converted to the RF-111C reconnaissance variant. Four ex-United States Air Force (USAF) F-111As were purchased by Australia and converted to F-111C standard in 1982 to replace F-111Cs destroyed during accidents. Australia also operated 15 F-111Gs between 1993 and 2007, mainly for conversion training.

Although never required in combat, the F-111Cs gave the RAAF a powerful regional strike capability. The aircraft went through modernisation programs in the 1980s and again in the 1990s with the RAAF acquiring improved weapon systems maintaining their capability to penetrate deep into hostile airspace.

By the mid 2000s, the F-111C fleet was somewhat technologically outdated and increasingly expensive to maintain. The decision to retire the fleet was made in 2010 rather than the originally planned 2020 timeframe, even though the F-35 was a long way from being operational leaving a large capability gap. The F-111s were replaced by 24 Boeing F/A-18F Super Hornets pending delivery of F-35 Lightning IIs in development, this still hasn’t occurred.