This year dates and cities:

RALEIGH-DURHAM, NORTH CAROLINA March 10-11, 2012
CHICAGO, IL. March 24-25, 2012
NASHVILLE, TN. April 13-15, 2012
KANSAS CITY, MO. May 19-20, 2012
PARSIPPANY, NEW JERSEY July 6-8, 2012
SAN ANTONIO, TEXAS August 25-26, 2012
DETROIT, MICHIGAN September 29-30, 2012
ORLANDO, FLORIDA December 7-9, 2012

For more information check the Official Twilight Conventions Site

Thanks to TeamTaylorLautner.Com