Major LEGO fan convention listings for North America
BrickWorld – held every year at various locations.
Website: BrickWorld.com
BrickFair – held every year at various locations.
Website: BrickFair.com
BrickCon – held every year in Seattle, Washington.
Website: BrickCon.org
BrickFiesta – held every year in various cities in Texas.
Website: BrickFiesta.com
Bricks-by-the-Bay – held every year in Northern California.
Website: BricksByTheBay.com
Brickfete – held every year in various Canadian cities.
Website: Brickfete.com
This list courtesy of The Brick Blogger
http://thebrickblogger.com/