The Ethel Barrymore Theatre is a Broadway theater at 243 West 47th Street in the Theater District of Midtown Manhattan in New York City, New York, U.S. Opened in 1928, it was designed by Herbert J. Krapp in the Elizabethan, Mediterranean, and Adam styles for the Shubert family. The theater, named in honor of actress Ethel Barrymore, has 1,058 seats and is operated by the Shubert Organization. Both the facade and the auditorium interior are New York City landmarks.

The ground-floor facade is made of rusticated blocks of terracotta. The theater's main entrance consists of two archways and a doorway shielded by a marquee. The upper stories contain an arched screen made of terracotta, inspired by Roman baths, which is surrounded by white brick. The auditorium contains ornamental plasterwork, a sloped orchestra level, a large balcony, and a coved ceiling with a 36 ft-wide (11 m) dome. The balcony level contains box seats topped by decorative arches. The theater was also designed with a basement lounge and a now-demolished stage house.

The Shubert brothers developed the Barrymore Theatre after Ethel Barrymore agreed to have the brothers manage her theatrical career. It opened on December 20, 1928, with The Kingdom of God, and was the last pre-Depression house developed by the Shuberts. Ethel Barrymore only worked with the Shuberts until 1932 and last performed in the theater in 1940. The Barrymore has consistently remained in use as a legitimate theater since its opening, hosting plays and musicals; it is one of the few Broadway theaters to have never been sold or renamed. The theater was refurbished in the 1980s and the 2000s.

The Ethel Barrymore Theatre is on 243 West 47th Street, on the north sidewalk between Eighth Avenue and Broadway, near Times Square in the Theater District of Midtown Manhattan in New York City, New York, U.S. The square land lot covers 10,050 sq ft (934 m²), with a frontage of 100 ft (30 m) on 47th Street and a depth of 100 feet. The Barrymore shares the block with the Samuel J. Friedman Theatre to the west, the Longacre Theatre to the north, and the Morgan Stanley Building to the east. Other nearby buildings include the Eugene O'Neill Theatre and Walter Kerr Theatre to the north; Crowne Plaza Times Square Manhattan to the northeast; 20 Times Square to the east; the Hotel Edison and Lunt-Fontanne Theatre to the south; and the Lena Horne Theatre and Paramount Hotel to the southwest.

The Ethel Barrymore Theatre was designed by Herbert J. Krapp in several styles and was constructed in 1928 for the Shubert brothers. The theater is named after actress Ethel Barrymore (1879–1959), a prominent member of the Barrymore family of actors, and is operated by the Shubert Organization. The Barrymore has been used continuously as a legitimate house and, unlike most Broadway theaters, has never been sold or renamed since its opening. The Barrymore was the last theater to be built by the Shubert Organization until 2003.

The facade is symmetrically arranged. The ground floor is clad in rusticated blocks of terracotta, painted in a limestone color, above a granite water table. At ground level, the auditorium entrance includes two arched openings, each with four aluminum and glass doors. The voussoirs of the arches are made of rusticated blocks, while the keystones at the centers of each arch are shaped like brackets. Within each arch, the spaces above the doors are infilled with black glazed tiles; originally, these spaces were filled with metal tracery. Between the arched doors is a smaller doorway, which is topped by a large keystone. Above all of these openings is a marquee with the name "Barrymore", which is supported by ornate bronze brackets. The presence of the large marquee obscures the contrast between the ground floor and upper stories. The brackets originally supported a smaller bronze-and-glass canopy, which curved upward in front of either arch.

On either side of the doors are terracotta niches with bronze-framed sign boards. Above the signboards are terracotta wreaths, which surround circular panels with the gilded letters "The Barrymore Theatre". Each wreath is topped by a curved pediment. The western and eastern portions of the facade are recessed slightly and contain recessed openings. The opening to the east is marked as the stage door. A frieze, decorated with leaf and wave moldings, runs above the first floor. To the east, there was originally a stage house with fire escapes on its facade, but this has since been replaced with the Morgan Stanley Building.

The upper stories are faced in bonded glazed-white brick. The central part of the facade includes a terracotta screen with an Ancient Roman-inspired pattern, surrounded by a cord molding. The screen includes a grid of squares, each of which contain central medallions with bars radiating in eight directions. To the left of the screen, the wall contains a sign with the name "Barrymore" and a metal fire escape. A metal sign hangs from the facade to the right. The top of the screen curves upward in a manner resembling a proscenium arch, and a brick parapet rises above the screen. A Greek key frieze and a cornice with talon moldings runs above the entire facade. Contemporary media from the theater's opening cited the top of the facade as being 62 ft (19 m) above the sidewalk, while the screen was 52 ft (16 m) wide.