The National Train Show or NTS, is held as part of the annual National Convention of the National Model Railroad Association

National Model Railroad Association

The National Model Railroad Association is a non-profit organization for those involved in the hobby or business of model railroading. It was founded in the United States in 1935, and is now active in Canada, Australia, Great Britain, and the Netherlands...

. It is held in a different city each year (Cincinnati, Ohio

Cincinnati, Ohio

Cincinnati is a city in the U.S. state of Ohio. Cincinnati is the county seat of Hamilton County. Settled in 1788, the city is located to north of the Ohio River at the Ohio-Kentucky border, near Indiana. The population within city limits is 296,943 according to the 2010 census, making it Ohio's...

 in 2005 and Philadelphia, Pennsylvania

Philadelphia, Pennsylvania

Philadelphia is the largest city in the Commonwealth of Pennsylvania and the county seat of Philadelphia County, with which it is coterminous. The city is located in the Northeastern United States along the Delaware and Schuylkill rivers. It is the fifth-most-populous city in the United States,...

in 2006, for example). It consists of industry exhibitors (railfan and model railroad targeted) and club layout exhibitions. In 2005, the NTS had about 300000 square feet (27,870.9 m²) of display space and about 20,000 paying visitors.