The Walter Kerr Theatre, previously the Ritz Theatre, is a Broadway theater at 219 West 48th 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 in 1921. The venue, renamed in 1990 after theatrical critic Walter Kerr, has 975 seats across three levels and is operated by Jujamcyn Theaters. The facade is plainly designed and is made of patterned brick. The auditorium contains Adam-style detailing, two balconies, and murals.

Walter Francis Kerr was an American writer and Broadway theatre critic. He also was the writer, lyricist, and/or director of several Broadway plays and musicals as well as the author of several books, generally on the subject of theater and cinema.