Leonard Ainsworth
| Len Ainsworth | |
|---|---|
| Born | Leonard Hasting Ainsworth 1922 or 1923 (age 101–102) Kempsey, New South Wales, Australia | 
| Occupations | 
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| Years active | 1953-2019 | 
| Known for | Aristocrat Leisure | 
| Spouses | 
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| Children | 7 | 
Leonard Hasting "Len" Ainsworth AM (born c. 1923) is an Australian businessman, most widely known for founding Aristocrat Leisure, one of the world's largest gambling-machine companies. He founded the company in 1953, and remained active until 1994; and later founded Ainsworth Gaming Technology, and was an executive director until 2019.