Entergy Tower, Glass and steel skyscraper in Central Business District, New Orleans, US

Entergy Tower, also known as One Poydras Plaza, is a 28-story, 360-foot-tall (110 m) skyscraper at 639 Loyola Avenue in the Central Business District of New Orleans, Louisiana.

The building was completed in 1983, during a period when downtown New Orleans was seeing a wave of new office construction. For a time, it housed the Japanese Consulate-General, which later moved to Nashville in 2006.

Entergy Tower's name comes from Entergy, the utility company headquartered in the building, which is also called One Poydras Plaza. From 639 Loyola Avenue it housed the Consulate-General of Japan in New Orleans until the Japanese government announced in 2006 that the mission would move to Nashville, Tennessee, to be nearer Japanese-owned industries and operations.

Entergy Tower stands at 639 Loyola Avenue in the Central Business District, a short walk from the Loyola Avenue streetcar line and the downtown bus routes along Poydras Street. The 28 floors are occupied office space, so the lobby and upper levels are not open to the public; the tower is best seen from the sidewalk outside.

Despite being built in the early 1980s, the tower later received an ENERGY STAR certification for its energy-efficient operations, which is rare for a building of that age. This kind of rating is only given to buildings that rank among the top performers in their category.