| 78721 | July 11 | Event | 1936 – The Triborough Bridge in New York City is opened to traffic. |
| 78722 | July 11 | Event | 1940 – World War II: Vichy France regime is formally established. Philippe Pétain becomes Prime Minister of France. |
| 78723 | July 11 | Event | 1943 – Massacres of Poles in Volhynia and Eastern Galicia by the Ukrainian Insurgent Army within the Reichskommissariat Ukraine (Volhynia) peak. |
| 78724 | July 11 | Event | 1943 – World War II: Allied invasion of Sicily – German and Italian troops launch a counter-attack on Allied forces in Sicily. |
| 78725 | July 11 | Event | 1947 – The Exodus 1947 heads to Palestine from France. |
| 78726 | July 11 | Event | 1950 – Pakistan joins the International Monetary Fund and the International Bank. |
| 78727 | July 11 | Event | 1957 – Prince Karim Husseini Aga Khan IV inherits the office of Imamat as the 49th Imam of Shia Imami Ismai'li worldwide, after the death of Sir Sultan Mahommed Shah Aga Khan III. |
| 78728 | July 11 | Event | 1960 – France legislates for the independence of Dahomey (later Benin), Upper Volta (later Burkina) and Niger. |
| 78729 | July 11 | Event | 1960 – Congo Crisis: The State of Katanga breaks away from the Democratic Republic of the Congo. |
| 78730 | July 11 | Event | 1960 – To Kill a Mockingbird by Harper Lee is first published, in the United States. |
| 78731 | July 11 | Event | 1962 – First transatlantic satellite television transmission. |
| 78732 | July 11 | Event | 1962 – Project Apollo: At a press conference, NASA announces lunar orbit rendezvous as the means to land astronauts on the Moon, and return them to Earth. |
| 78733 | July 11 | Event | 1971 – Copper mines in Chile are nationalized. |
| 78734 | July 11 | Event | 1972 – The first game of the World Chess Championship 1972 between challenger Bobby Fischer and defending champion Boris Spassky starts. |
| 78735 | July 11 | Event | 1973 – Varig Flight 820 crashes near Paris, France on approach to Orly Airport, killing 123 of the 134 on board. In response, the FAA bans smoking on flights. |
| 78736 | July 11 | Event | 1977 – Martin Luther King, Jr. is posthumously awarded the Presidential Medal of Freedom. |
| 78737 | July 11 | Event | 1978 – Los Alfaques disaster: A truck carrying liquid gas crashes and explodes at a coastal campsite in Tarragona, Spain killing 216 tourists. |
| 78738 | July 11 | Event | 1979 – America's first space station, Skylab, is destroyed as it re-enters the Earth's atmosphere over the Indian Ocean. |
| 78739 | July 11 | Event | 1990 – Oka Crisis: First Nations land dispute in Quebec, Canada begins. |
| 78740 | July 11 | Event | 1991 – Nigeria Airways Flight 2120 crashes in Jeddah, Saudi Arabia killing all 261 passengers and crew onboard |
| 78741 | July 11 | Event | 1995 – The Srebrenica massacre is carried out. |
| 78742 | July 11 | Event | 2006 – Mumbai train bombings: Two hundred nine people are killed in a series of bomb attacks in Mumbai, India. |
| 78743 | July 11 | Event | 2010 – July 2010 Kampala attacks: At least 74 people are killed in twin suicide bombings at two locations in Kampala, Uganda |
| 78744 | July 11 | Event | 2011 – Evangelos Florakis Naval Base explosion: Ninety-eight containers of explosives self-detonate killing 13 people in Zygi, Cyprus. |
| 78745 | July 11 | Event | 2012 – Astronomers announce the discovery of Styx, the fifth moon of Pluto. |
| 78746 | July 11 | Birth | 154 – Bardaisan, Syrian astrologer, scholar, and philosopher (d. 222) |
| 78747 | July 11 | Birth | 1274 – Robert the Bruce, Scottish king (d. 1329) |
| 78748 | July 11 | Birth | 1558 – Robert Greene, English author and playwright (d. 1592) |
| 78749 | July 11 | Birth | 1561 – Luis de Góngora, Spanish cleric and poet (d. 1627) |
| 78750 | July 11 | Birth | 1603 – Kenelm Digby, English astrologer, courtier, and diplomat (d. 1665) |