List of Famous people who died at 30

On 10 August 2017, Swedish freelance journalist Kim Wall boarded the midget submarine UC3 Nautilus, in Køge Bugt, Denmark, with the intent of interviewing its owner, Danish entrepreneur Peter Madsen. She was reported missing after Nautilus failed to return to Refshaleøen, Copenhagen. The submarine was found sunken the following morning and Madsen was arrested upon being rescued from the water. Between 21 August and 29 November, Wall's dismembered body parts were found in different locations around the area. Charged with her murder, Madsen was convicted and sentenced to life imprisonment on 25 April 2018 by Copenhagen City Court following a widely publicised trial. The case is also known in Denmark as Ubådssagen.

Neilia Hunter Biden was an American teacher and the first wife of U.S. President Joe Biden. She died in a car crash in 1972 with her one-year-old daughter, Naomi; her two sons, Beau and Hunter, were critically injured but survived.

Ellen Radka Toneff was a Norwegian jazz singer, daughter of the Bulgarian folk singer, pilot and radio technician Toni Toneff, she was born in Oslo and grew up in Lambertseter and Kolbotn. She is still considered one of Norway's greatest jazz singers.

István Kozma was a Hungarian Greco-Roman wrestler. He won an Olympic gold medal in 1964 and 1968 and the World Championship in 1962, 1966, and 1967. In 1967 he was selected as the Hungarian Sportsman of the Year. Kozma died in a car accident, aged 30.

Jan Werner Danielsen, known professionally as Jan Werner, was a Norwegian pop singer, also known for his interpretations of musical, classical, and rock standards. He was famous for his powerful voice which stretched over four and a half octaves. His breakthrough came after winning two important talent contests, most notably on national television in the show Talentiaden (NRK) in 1994.

Wang Qiang was a Chinese serial killer from Budayuan Town, Kuandian Manchu Autonomous County, Liaoning, China and one of the most notorious murderers and rapists in Chinese history.