The 1984 Summer Olympics were an international multi-sport event held from July 28 to August 12, 1984, in Los Angeles, California, United States. It marked the second time that Los Angeles had hosted the Games, the first being in 1932. California was the home state of the incumbent U.S. President Ronald Reagan, who officially opened the Games. These were the first Summer Olympic Games under the IOC presidency of Juan Antonio Samaranch.

The 2028 Summer Olympics, officially known as the Games of the XXXIV Olympiad, and commonly known as Los Angeles 2028 or LA28, is an upcoming international multi-sport event scheduled to take place from July 14 to 30, 2028, in Los Angeles, California, United States.