Historic Events on July 9
- 455 – Avitus becomes Emperor of the Western Roman Empire.
- 1540 – King Henry VIII of England annuls his marriage to Anne of Cleves.
- 1755 – General Edward Braddock is mortally wounded.
- 1816 – Argentina declares independence from Spain.
- 1850 – President Zachary Taylor dies after eating spoiled fruit.
- 1900 – Queen Victoria gives royal assent to the Commonwealth of Australia Constitution Act.
- 1944 – The Battle of Saipan ends.
- 1955 – The Russell-Einstein Manifesto is issued.
- 1962 – The Starfish Prime high-altitude nuclear test is conducted.
- 1979 – A car bomb destroys a Renault motor car owned by the "Nazi hunters".
- 1982 – Pan Am Flight 759 crashes in Kenner, Louisiana.
- 1993 – The Parliament of Canada passes the Nunavut Act.
- 2002 – The African Union is established.
- 2011 – South Sudan gains independence from Sudan.
- 2018 – Thailand cave rescue: All 12 boys and their coach are rescued.