| SummerSlam | |
|---|---|
 SummerSlam logo used from 2012 to 2021; this logo is also still occasionally used in marketing material. | |
| Promotion | WWE |
| Brands | Raw (2002–2011, 2016–present) SmackDown (2002–2011, 2016–present) 205 Live (2018–2019) ECW (2006–2009) |
| Nickname | "The Biggest Party of the Summer" |
| First event | 1988 |
SummerSlam is a professional wrestling event, produced annually since 1988 by the world's largest professional wrestling promotion, WWE. Dubbed "The Biggest Party of the Summer", it is considered WWE's second biggest event of the year behind their flagship event, WrestleMania. It is also considered one of the company's five biggest events of the year, along with WrestleMania, Royal Rumble, Survivor Series, and Money in the Bank, referred to as the "Big Five". The event has been broadcast on pay-per-view (PPV) since the inaugural 1988 event and via livestreaming since the 2014 event.
The inaugural SummerSlam took place on August 29, 1988, at Madison Square Garden in New York City. The 1992 event was the company's first major PPV to take place outside of North America with it being held at the original Wembley Stadium in London, England; it had a reported attendance of 80,355, which as of April 2023, WWE considers this to be their seventh largest live gate in history. From 2009 to 2014, SummerSlam was held at the Staples Center in Los Angeles, California and from 2015 to 2018, the event took place at the Barclays Center in the New York City borough of Brooklyn. Beginning with the 2021 event, SummerSlam has been held in National Football League stadiums across the United States. From its inception up through that 2021 event, SummerSlam was held annually in August. The 2022 event marked the first and thus far only time that the event was not held in August, as it was instead held in July, with SummerSlam returning to August with the 2023 edition. The 2025 event will expand SummerSlam to two nights.
During the COVID-19 pandemic in 2020, that year's SummerSlam was WWE's first PPV and livestreaming event produced from their bio-secure bubble, the WWE ThunderDome. After the promotion resumed live touring with fans in July 2021, that year's SummerSlam was promoted as the "biggest event of 2021" due to WrestleMania 37 having to be held at a reduced venue capacity. The 2021 SummerSlam in turn became the highest-grossing SummerSlam event of all time until that record was broken with the 2023 event, which also became the highest-grossing non-WrestleMania event for WWE.