The Arcada Theatre Building is a theater in St. Charles, Illinois, located on Main Street (which becomes North Avenue (Chicago) further eastward).

The theatre was opened on Labor Day, September 6, 1926, engaging projection of silent movies and the staging of live vaudeville acts.

Many legendary stars have graced the stage, including George Burns and Gracie Allen, Judy Garland, Edgar Bergen and Charlie McCarthy, Olivia de Havilland, the John Philip Sousa Band, Liberace, Mitzi Gaynor, Cornelia Otis Skinner, Vincent Price, Carol Channing, Jeanette MacDonald, Walter Slezak and the Von Trapp Family Singers.

Making use of its standing as a producer of entertainment shows in the United States, the OEC brought marquee performances typical of major city downtowns to the far western suburbs of Chicago.

Among other notable performers, The B-52's, 38 Special, Poi Dog Pondering, Sophia Loren, Mickey Rooney, Shirley MacLaine, Jerry Lewis, Frank Sinatra Jr. (2015), Dionne Warwick, Joan Rivers, Paul Anka, Kenny Rogers, Pat Benatar, Three Dog Night, Petula Clark (2017), Wayne Newton, Frankie Avalon, Dana Carvey (2012), Molly Ringwald (2013), Corey Feldman (2017), Scott Weiland (2015), Fastball (2021), Rich Little, Eric Burdon, Gladys Knight (2022), Howie Mandel, The Lettermen, and Martin Short have been recent headliners.