The Spirit class is a class of cruise ships built at the Kvaerner Masa-Yards Helsinki New Shipyard in Helsinki, Finland. The ships are operated by Carnival Cruise Lines, Adora Cruises and Margaritaville at Sea. The six ships were built to the original Panamax form factor, allowing them to pass through the Panama Canal. This class has the smallest of the signature smoke stacks that Carnival has on their ships. Carnival's Spirit-class ships also feature a unique funnel design that integrates the skylight dome of the atrium.

In 2007 and 2009, Queen Victoria and Costa Luminosa (built by Fincantieri) were introduced. The design of these ships are a hybrid between the Spirit class and the Vista class, creating the Vista/Spirit hybrid class. As of November 2022, Costa Luminosa (now Carnival Luminosa) is marketed by Carnival as a part of their Spirit class.