Having previously hosted the 1900 and 1924 Games, Paris did not attempt to host the Olympics again until it bid, unsuccessfully, for the 1992 Games which were awarded to Barcelona. Subsequent bids for the 2008 and 2012 Games were also unsuccessful, as they were awarded to Beijing and London, respectively. Undeterred, Paris decided to bid once more for the 2024 edition, which would mark the centenary of its last Games.

The six candidate cities were Paris, Hamburg, Boston, Budapest, Rome, and Los Angeles. The bidding process was slowed by withdrawals, political uncertainty, and rising costs. Boston surpassed Los Angeles, San Francisco, and Washington, DC, for the official U.S. bid. On 27 July 2015, Boston and the USOC mutually agreed to terminate Boston's bid to host the Games, partly because of mixed feelings among city residents. Hamburg withdrew its bid on 29 November 2015 after holding a referendum. Rome withdrew on 21 September 2016, citing fiscal difficulties. Budapest withdrew on 22 February 2017, after a petition against the bid collected more signatures than necessary for a referendum.

Following these withdrawals, the IOC Executive Board met on 9 June 2017 in Lausanne, Switzerland, to discuss the 2024 and 2028 bid processes. The International Olympic Committee formally proposed electing the 2024 and 2028 Olympic host cities at the same time, a proposal which an Extraordinary IOC Session approved on 11 July 2017 in Lausanne. The IOC set up a process whereby the LA 2024 and Paris 2024 bid committees met with the IOC to discuss which city would host the Games in 2024 and 2028 and whether it was possible to select the host cities for both at the same time.

Following the decision to award the two Games simultaneously, Paris was understood to be the preferred host for 2024. On 31 July 2017, the IOC announced Los Angeles as the sole candidate for 2028, enabling Paris to be confirmed as host for 2024. Both decisions were ratified at the 131st IOC Session on 13 September 2017.
Paris was elected as the host city on 13 September 2017 at the 131st IOC Session in Lima, Peru. The two French IOC members, Guy Drut and Tony Estanguet, were ineligible to vote under the rules of the Olympic Charter.

Most of the Olympic events were held in the city of Paris and its metropolitan region, including the neighbouring cities of Saint-Denis, Le Bourget, Nanterre, Versailles, and Vaires-sur-Marne.

The basketball preliminaries and handball finals were held in Lille, 225 km (140 mi) from the host city, Paris; the sailing and some of the football games were held in the Mediterranean city of Marseille, which is 777 km (483 mi) from Paris; meanwhile, the surfing events were held in Teahupo'o village in the overseas territory of Tahiti, French Polynesia, which is 15,716 km (9,765 mi) from Paris. Football was also hosted in an additional five cities: Bordeaux, Décines-Charpieu (Lyon), Nantes, Nice and Saint-Étienne, some of which are home to Ligue 1 clubs.
The president of the Paris 2024 Olympic Organizing Committee, Tony Estanguet, unveiled the Olympic and Paralympic medals for the Games in February 2024, which on the obverse featured embedded hexagon-shaped tokens of scrap iron that had been taken from the original construction of the Eiffel Tower, with the logo of the Games engraved into it. Approximately 5,084 medals would be produced by the French mint Monnaie de Paris, and were designed by Chaumet, a luxury jewellery firm based in Paris.

The reverse of the medals features Nike, the Greek goddess of victory, inside the Panathenaic Stadium which hosted the first modern Olympics in 1896. Parthenon and the Eiffel Tower can also be seen in the background on both sides of the medal. Each medal weighs 455–529 g (16–19 oz), has a diameter of 85 mm (3.3 in) and is 9.2 mm (0.36 in) thick. The gold medals are made with 98.8 percent silver and 1.13 percent gold, while the bronze medals are made up with copper, zinc, and tin.
France reached an agreement with Europol and the UK Home Office to help strengthen security and "facilitate operational information exchange and international law enforcement cooperation" during the Games. The agreement included a plan to deploy more drones and sea barriers to prevent small boats from crossing the Channel illegally. The British Army would also provide support by deploying Starstreak surface-to-air missile units for air security. To prepare for the Games, the Paris police held inspections and rehearsals in their bomb disposal unit, similar to their preparations for the 2023 Rugby World Cup at the Stade de France.

As part of a visit to France by Qatari Emir Sheikh Tamim bin Hamad Al-Thani, several agreements were signed between the two nations to enhance security for the Olympics. In preparation for the significant security demands and counterterrorism measures, Poland pledged to contribute security troops, including sniffer dog handlers, to support international efforts aimed at ensuring the safety of the Games. The Qatari Minist…

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The opening ceremony began at 19:30 CEST (17:30 GMT) on 26 July 2024. Directed by Thomas Jolly, it was the first Summer Olympics opening ceremony to be held outside the traditional stadium setting (and the second ever after the 2018 Youth Olympic Games one, held at Plaza de la República in Buenos Aires); the parade of athletes was conducted as a boat parade along the Seine from Pont d'Austerlitz to Pont d'Iéna, and cultural segments took place at various landmarks along the route. Jolly stated that the ceremony would highlight notable moments in the history of France, with an overall theme of love and "shared humanity". The athletes then attended the official protocol at Jardins du Trocadéro, in front of the Eiffel Tower. Approximately 326,000 tickets were sold for viewing locations along the Seine, 222,000 of which were distributed primarily to the Games' volunteers, youth and low-income families, among others.

The ceremony featured music performances by American musician Lady Gaga, French-Malian singer Aya Nakamura, heavy metal band Gojira and soprano Marina Viotti [fr], Axelle Saint-Cirel (who sang the French national anthem "La Marseillaise" atop the Grand Palais), rapper Rim'K, Philippe Katerine (who portrayed the Greek god Dionysus), Juliette Armanet and Sofiane Pamart, and was closed by Canadian singer Céline Dion. The Games were formally opened by president Emmanuel Macron.

The Olympics and Paralympics cauldron was lit by Guadeloupean judoka Teddy Riner and sprinter Marie-José Pérec; it had a hot air balloon-inspired design topped by a 30-metre-tall (98 ft) helium sphere, and was allowed to float into the air above the Tuileries Garden at night. For the first time, the cauldron was not illuminated through combustion; the flames were simulated by an LED lighting system and aerosol water jets.

Controversy ensued at the opening ceremony when a segment was interpreted by some as a parody of the Last Supper. The organisers apologised for any offence caused. The Olympic World Library and fact-checkers would later debunk the interpretation that the segment was a parody of the Last Supper. The Olympic flag was also raised upside down.

During the day of the opening ceremony, there were reports of a blackout in Paris, although this was later debunked.
The programme of the 2024 Summer Olympics featured 329 events in 32 sports, encompassing a total of 48 disciplines. This included the 28 "core" Olympic sports contested in 2016 and 2020, and 4 optional sports that were proposed by the Paris Organising Committee: breakdancing made its Olympic debut as an optional sport, while skateboarding, sport climbing, and surfi…

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