|Address||100 Harbour Parade|
|Town or city||Southampton|
|Current tenants||Carnival UK|
|Owner||Carnival Corporation & plc|
|Design and construction|
Carnival House is a landmark office building in the city of Southampton, Hampshire, England. It is a purpose-built headquarters for Carnival UK, the United Kingdom operating company of Carnival Corporation & plc, the world's largest cruise shipping company. The building was officially opened on Sunday 19 July 2009.
Carnival House contains the head offices of P&O Cruises and Cunard Line. It also houses the UK offices of Princess Cruises, (headquartered in Santa Clarita, California) and Seabourn / Holland America Line (headquartered in Seattle, Washington). In addition Carnival Corporation's new build division is based in the building. 
The distinctive wave patterns on the two panels of the building facade represent propagation of oceanic Rossby waves and were created by using real satellite data (sea surface height anomaly data from satellite altimetry) provided by Paolo Cipollini and Peter Challenor of the National Oceanography Centre, Southampton.