Casey Airfield, later known as Berwick Airfield (ICAO: YBER), was a small airfield for light aircraft located in Berwick, Victoria, Australia. It was built by Rupert Ryan on land he had interited in 1935 and with his sister Ethel ("Maie") had turned it into a successful stud farm "Edrington". Maie had married Richard Casey (later Baron Casey, the 16th Governor-General of Australia) in 1921.

In 1937, Richard and Maie Casey took flying lessons, obtained their licences and bought a Percival Vega Gull which Richard flew between Melbourne and Canberra. Ryan built a landing strip on the property in 1938 and built a hangar to house the Gull. When certified as an aerodrome in June of that year it was named Casey Airfield. Use of the airfield was suspended at the outbreak of World War II and the Caseys' Gull was impressed into the Royal Australian Air Force in November 1939.

The airfield resumed operation in 1947 when Ryan gave permission for the Victorian Motorless Flight Group to use it for glider operations and sport parachuting. VMFG relocated to Bacchus Marsh Airfield in 1962. Richard Casey purchased a Miles Messenger in 1953 and housed it at the airfield until 1962.

In 1968 the airfield was taken over by Groupair Pty Ltd, founded by Keith Hatfield and Ron Kerrison, and renamed Berwick Airfield. Groupair operated a flying school, aerial charter operation and aircraft maintenance facilities. The company had plans for expansion and to turn it into a commercial airport. Some promotional material referred to the location as "Casey Airport". The Royal Victorian Aero Club also conducted flying training from the airfield and planned to move up to 60% of basic flying training away from Moorabbin Airport. Following Kerrison's death in a flying accident in 1969, the company was bought out by millionaire grazier Bryce Killen. The company went into liquidation in 1978 and the assets were bought by Pressfast Industries which planned to turn the site into business park, with a small area retained for helicopter operations. A helicopter hangar was constructed in 1982 but the airfield was out of use by 1989.

The airfield formally closed in 1994 and the Victoria State Government acquired the land. In 1996 it became the Berwick Campus of Monash University. The original 1938 hangar and Casey's Miles Messenger are preserved at the Australian National Aviation Museum at Moorabbin Airport. In 2018 the site became Federation University Australia, Berwick campus.

• List of airports in Victoria

• Queer Birds - a 1950s film showing gliding at the airfield