The Eugene O'Neill Theatre, previously the Forrest Theatre and the Coronet Theatre, is a Broadway theater at 230 West 49th Street in the Theater District of Midtown Manhattan in New York City. The theater was designed by Herbert J. Krapp and was constructed for the Shubert brothers. It opened in 1925 as part of a hotel and theater complex named after 19th-century tragedian Edwin Forrest. The modern theater, named in honor of American playwright Eugene O'Neill, has 1,108 seats across two levels and is operated by Jujamcyn Theaters. The auditorium interior is a New York City designated landmark.

New York City's Theater District, sometimes spelled Theatre District and officially zoned as the "Theater Subdistrict", is an area and neighborhood in Midtown Manhattan where most Broadway theaters are located, in addition to other theaters, movie theaters, restaurants, hotels, and other places of entertainment. It is bounded by West 40th Street on the south, West 54th Street on the north, Sixth Avenue on the east and Eighth Avenue on the west, and includes Times Square. The Great White Way is the name given to the section of Broadway which runs through the Theater District.