RFK Stadium in Washington is the leading choice of four eastern stadiums being considered as sites for preliminary round soccer games in the 1984 Olympics, according to one official of the Los Angeles Olympics Organizing Committee.

"The location of the city, the fact it is the nation's capital with a good soccer community, and the physical dimensions of the stadium, have put Washington at the fore of our interest," said the official, who wished to remain anonymous.

The official said the Federation Internationale de Football Association (FIFA), the governing body of world soccer, has demanded that the Games use four stadiums for soccer competition, the same number of stadiums used in recent Olympic and World Cup soccer tournaments.

The committee official said stadiums in St. Louis, Philadelphia and Indianapolis also are under consideration.

Another LAOC official, Amy Collis, said the committee has agreed to use four stadiums. "We're looking at the opportunity for showcasing one of the world's most popular sports over a wide area," she said, adding the committee will announce its decision in one or two months.

The semifinals and finals of the 1984 Olympics soccer will be held in the Rose Bowl in Pasadena. Major league baseball schedules make it difficult for such other Los Angeles-area stadiums as Dodger Stadium, Anaheim Stadium and San Diego's Jack Murphy Stadium to be used for soccer.

International soccer requirements provide further constraints: The playing field must be 75 yards wide (U.S. football fields are 53 yards wide) and must have a natural surface.

Four members of the LAOC toured RFK Stadium two weeks ago, said Steve Murphy, stadium manager. "It certainly seemed upbeat," he said. "Very positive. They said they would get back to us for costs and tentative dates.