| 111781 | September 30 | Event | 1945 – The Bourne End rail crash, in Hertfordshire, England, kills 43 |
| 111782 | September 30 | Event | 1947 – Pakistan and Yemen join the United Nations. |
| 111783 | September 30 | Event | 1947 – The World Series, featuring the New York Yankees and the Brooklyn Dodgers, is televised for the first time. |
| 111784 | September 30 | Event | 1949 – The Berlin Airlift ends. |
| 111785 | September 30 | Event | 1954 – The U.S. Navy submarine USS Nautilus is commissioned as the world's first nuclear reactor powered vessel. |
| 111786 | September 30 | Event | 1955 – Film star James Dean dies in a road accident aged 24. |
| 111787 | September 30 | Event | 1962 – Mexican-American labor leader César Chávez founds the National Farm Workers Association, which later becomes United Farm Workers. |
| 111788 | September 30 | Event | 1962 – James Meredith enters the University of Mississippi, defying segregation. |
| 111789 | September 30 | Event | 1965 – The Lockheed L-100, the civilian version of the C-130 Hercules, is introduced. |
| 111790 | September 30 | Event | 1965 – The 30 September Movement attempts a coup against the Indonesian government, which is crushed by the military under Suharto and leads to a mass anti-communist purge, with over 500,000 people killed. |
| 111791 | September 30 | Event | 1965 – Trapped in the Sky, the pilot episode of Gerry Anderson's beloved Thunderbirds, airs on ITV for the first time. |
| 111792 | September 30 | Event | 1966 – The British protectorate of Bechuanaland declares its independence, and becomes the Republic of Botswana. Seretse Khama takes office as the first President. |
| 111793 | September 30 | Event | 1967 – BBC Light Programme, Third Programme and Home Service are replaced with BBC Radio 2, 3 and 4 Respectively, BBC Radio 1 is also launched with Tony Blackburn presenting its first show. |
| 111794 | September 30 | Event | 1968 – The Boeing 747 is rolled out and shown to the public for the first time at the Boeing Everett Factory. |
| 111795 | September 30 | Event | 1970 – Jordan makes a deal with the Popular Front for the Liberation of Palestine (PFLP) for the release of the remaining hostages from the Dawson's Field hijackings. |
| 111796 | September 30 | Event | 1972 – Roberto Clemente records the 3,000th and final hit of his career. |
| 111797 | September 30 | Event | 1975 – The Hughes (later McDonnell Douglas, now Boeing) AH-64 Apache makes its first flight. |
| 111798 | September 30 | Event | 1977 – Because of US budget cuts and dwindling power reserves, the Apollo program's ALSEP experiment packages left on the Moon are shut down. |
| 111799 | September 30 | Event | 1979 – The Hong Kong MTR commences service with the opening of its Modified Initial System (aka. Kwun Tong Line). |
| 111800 | September 30 | Event | 1980 – Ethernet specifications are published by Xerox working with Intel and Digital Equipment Corporation. |
| 111801 | September 30 | Event | 1982 – Cyanide-laced Tylenol kills six people in the Chicago area. Seven are killed in all. |
| 111802 | September 30 | Event | 1986 – Mordechai Vanunu, who revealed details of Israel's covert nuclear program to British media, is kidnapped in Rome, Italy by the Israeli Mossad. |
| 111803 | September 30 | Event | 1988 – Al Holbert was fatally injured when his privately owned propeller driven Piper PA-60 aircraft crashed shortly after takeoff near Columbus, Ohio when a clamshell door was not closed. |
| 111804 | September 30 | Event | 1990 – The Dalai Lama unveils the Canadian Tribute to Human Rights in Canada's capital city of Ottawa. |
| 111805 | September 30 | Event | 1993 – An earthquake hits India's Latur and Osmanabad district of Marathwada (Aurangabad division) in Maharashtra state leaving tens of thousands of people dead and many more homeless. |
| 111806 | September 30 | Event | 1994 – Aldwych tube station (originally Strand Station) of the London Underground closes after eighty-eight years in service. |
| 111807 | September 30 | Event | 1994 – Ongar railway station, the furthest London Underground from Central London, closes. |
| 111808 | September 30 | Event | 1999 – Japan's second-worst nuclear accident at a uranium reprocessing facility in Tōkai-mura, northeast of Tokyo. |
| 111809 | September 30 | Event | 2004 – The first images of a live giant squid in its natural habitat are taken 600 miles south of Tokyo. |
| 111810 | September 30 | Event | 2004 – The AIM-54 Phoenix, the primary missile for the F-14 Tomcat, is retired from service. Almost two years later, the Tomcat is retired. |