**Cruise Lines International Association (CLIA)** is the world's largest cruise industry trade association, representing over 95% of global cruise capacity through its 50+ cruise line members, 350+ executive partners, 13,000+ travel agencies, and 50,000+ agents, serving more than 30 million passengers annually.[1][2][4] Founded in **1975**, CLIA emerged to unify cruise operators amid the shift from ocean liners to leisure voyages, following air travel's dominance in the 1950s that repurposed ships for pleasure cruises.[1][3] It merged with the International Council of Cruise Lines (ICCL) in **2006**, expanding its scope to include ocean, river, and specialty lines while basing operations in Washington, D.C.[1][2] This consolidation bolstered its influence, growing from 20 member lines in the early 2000s to 59 today, overseeing a fleet of 310 ships in 2025.[4][6] CLIA's core functions include **advocacy for safe, sustainable operations**, policy leadership, and fostering innovation like net-zero emissions by 2050, alongside resources for members on tourism strategies and community benefits.[2] Key achievements encompass driving industry growth—from 1.4 million passengers in 1980 to over 30 million today—and proactive COVID-19 responses, such as voluntarily suspending U.S. sailings in March 2020 ahead of CDC orders.[1][6] Its mission emphasizes members' success and responsible operations, positioning cruises as a leader in sustainable travel.[2] Currently, CLIA maintains a **global presence** despite gaps like limited African representation, uniting maritime leaders, ports, and shipyards.[1][2][4] Notable aspects include diversified memberships and economic impact, though non-members handle significant passenger volumes without regulatory mandates.[1] Amid business-tech news, CLIA drives tech innovations in sustainability and operation