National Travel & Tourism Office (NTTO):

The NTTO creates a positive climate for growth in travel and tourism by reducing institutional barriers to tourism, administers joint marketing efforts, provides official travel and tourism statistics, and coordinates efforts across federal agencies through the Tourism Policy Council. https://travel.trade.gov/

Market Research on International Visitation to the US

2018 U.S. Travel and Tourism Statistics (Inbound):

2017 U.S. Travel and Tourism Statistics (Inbound):