If it’s raw square feet you need and plenty of hotel rooms, you’ll want to consider one of the top 25 convention centers. These facilities are in cities that are the busiest places in terms of convention visits according to a report by the Travel Industry Association of America (TIA), the National Business Travel Association (NBTA) and the Institute of Business Travel Management.

• 1. McCormick Place Chicago, IL
  
  Located along Lake Michigan, McCormick Place is the nation's number one convention center, attracting close to 3 million visitors each year.
  
• 2. Las Vegas Convention CenterLas Vegas, NV
  
  As an epic, vast, and state-of-the-art facility, the Las Vegas Convention Center, totaling more than 3.2 million sq ft, exceeds even Vegas' highest standards.
  
• 3. Washington Convention CenterWashington, DC
  
  In addition to its relatively new convention center, Washington's many attractions make this a popular convention destination with attendees.
  
• 4. Orange County Convention CenterOrlando, FL
  
  "Orlando continues to be a leader in the tradeshow industry, and we anticipate continued growth as we see further development in the area around the convention center," said Tom Ackert, executive director.
  
  
• 5. Georgia World Congress CenterAtlanta, GA
  
  Combined with the 71,250-seat Georgia Dome and 21-acre Centennial Olympic Park, the Georgia World Congress Center is part of a mega-business trifecta.
  
• 6. Dallas Convention CenterDallas, TX
  
  The Dallas Convention Center is located in its own district, yet a stone's throw from arts, downtown and nightlife.
  
• 7. The Moscone CenterSan Francisco, CA
  
  The Moscone Center: an urban center that is completely accessible by subway and light rail in the heart of downtown San Francisco.
  
• 8. Nashville Convention CenterNashville, TN
  
  While the city council kicks around plans to build a new convention center, Nashville's current center is going strong downtown.
  
• 9. San Diego Convention CenterSan Diego, CA
  
  A half mile state-of-the-art convention facility that hosts national meetings of all kinds and leaves attendees with many things to do in the Gaslamp District.
  
• 10. Ernest Morial Convention CenterNew Orleans, LA
  
  The Morial Convention Center is not only a self-sufficient business venue, it is also a part of New Orleans' flourishing downtown.
  
• 11. Colorado Convention CenterDenver, CO
  
  The convention center is in the heart of downtown Denver with all its performing arts, zoo and museums and of course, Rocky Mountains.
  
• 12. Henry B. Gonzalez Convention CenterSan Antonio, TX
  
  Located along San Antonio's famous River Walk, this facility is the center of a strong convention industry that seems to come as naturally as a tourist's walk.
  
• 13. Phoenix Convention CenterPhoenix, AZ
  
  With much of the expansion of the facility complete, the center now ranks in the top 20 largest facilities in the US with 900,000 square feet of flexible meeting and exhibit space.
  
• 14. Los Angeles Convention CenterLos Angeles, CA
  
  Everything is within an easy walk from the convention center and lots of downtown entertainment.
  
• 15. John B. Hynes Convention CenterBoston, MA
  
  Only four miles from Logan Airport and nestled in Beantown's historic Back Bay, the Hynes Convention Center, with a total of 360,000 sq ft, is perfect for events intimate or grand.
  
• 16. Pennsylvania Convention CenterPhiladelphia, PA
  
  The center's meeting and exhibit space in the heart of downtown Philadelphia is set to grow to approximately one million square feet in the years ahead.
  
• 17. Minneapolis Convention CenterMinneapolis, MN
  
  This city can host groups well over 10000 like the 2008 Republican National Convention.
  
• 18. Austin Convention CenterAustin, TX
  
  In the Texas captial city, this young convention center is growing Austin's convention industry.
  
• 19. Jacob K. Javits Convention CenterNew York, NY
  
  The Jacob K. Javits Convention Center hosts some of the most prestigious events every year, from fashion shows, web expos, to star-studded fundraisers and benefits.
  
• 20. Washington State Convention & Trade CenterSeattle, WA
  
  An expansion in 2001 doubled its meeting and exhibit space and now another exapnsion is proposed that would double its space by 2014.
  
• 21. Renaissance Conference CenterDetroit, MI
  
  Detroit promotes itself as edgy, urban and creative, the center is connected to Detroit's largest hotel and six other skyscrapers downtown.
  
• 22. Convention Center of TampaTampa, FL
  
  Combines views of Tampa Bay Harbor with all the conveniences of downtown location.
  
• 23. America's Center Convention ComplexSt. Louis, MO
  
  America's Center features over 500,000 contiguous square feet of exhibit space in six halls within walking distance of St. Louis' many attractions.
  
• 24. Riverside Convention CenterRiverside, CA
  
  A fast growing high tech community surrounds the center and makes it a leader in California's convention business.
  
• 25. George R. Brown Convention CenterHouston, TX
  
  Ample exhibit space, new downtown hotels and theater make Houston a top choice for a growing number of national conventions.