Kimberly Noel Kardashian (born October 21, 1980) is an American media personality, socialite, and businesswoman. She first gained media attention as a friend and stylist of Paris Hilton, but received wider notice after the sex tape Kim Kardashian, Superstar, which she filmed in 2003 with her then-boyfriend Ray J, was released in 2007. Later that year, she and her family began to appear on the E! reality television series Keeping Up with the Kardashians, which aired until 2021. Its success led to the formation of three spin-off shows; Kourtney and Kim Take New York (2011–2012), Kourtney and Kim Take Miami (2009–2013) and Hulu's The Kardashians (2022–present).

Kardashian has developed a significant presence online and across numerous social media platforms, including her hundreds of millions of followers on Twitter and Instagram. With sisters Kourtney and Khloé, she launched the fashion boutique chain Dash, which operated from 2006 to 2018. Kardashian founded KKW Beauty and KKW Fragrance—both of which operated from 2017 till 2022. The former was valued at over US$1 billion as of 2021. She founded the shaping underwear or foundation garment company Skims in 2019, which is valued at over US$4 billion, as of 2023. Following the closure of her cosmetics and fragrance brands, Kardashian founded her skincare line, Sknn By Kim, in 2022. She has released a variety of products tied to her name, including the 2014 mobile game Kim Kardashian: Hollywood and the 2015 photo book Selfish. Her acting credits include the films Disaster Movie (2008), Temptation: Confessions of a Marriage Counselor (2013), two PAW Patrol films (2021 and 2023), and the twelfth season of the anthology horror series American Horror Story (2023–2024).

She was named on Fortune magazine's list of Most Powerful Women in 2023. Time magazine included Kardashian on their list of 2015's 100 most influential people. Both critics and admirers have described her as exemplifying the notion of being famous for being famous. She became a billionaire in 2021, and is estimated by Forbes to be worth US$1.7 billion as of 2024. Kardashian has become more politically active by lobbying for prison reform and clemency, and, as of 2019, is under a four-year law apprenticeship supervised by the legal nonprofit #cut50. She is thrice divorced; her third marriage to rapper Kanye West received significant media coverage, and the two of them have four children together.