Olympic Fanfare and Theme is a piece of music written by John Williams for the 1984 Olympic Games, which were held in Los Angeles.

The first part (presumably the fanfare) is one minute long, consisting of about 45 seconds of upbeat and somewhat repetitious orchestrated music, which is heavy on the brass and percussion, followed by a very distinctive 15-second theme dominated by trumpets and horns. These portions, being reasonably short and having high recognition value , are quite frequently heard in association with Television broadcasts of the Olympic Games, usually as an introduction or transition.

The remainder of the work (which is four minutes and twenty-eight seconds long altogether) explores the theme further and is musically interesting but much less frequently heard and consequently less widely recognized.

Olympic Fanfare and Theme was awarded a Grammy in 1985.