about 18 or 20 teams.
April 5
Princeton hasn't won a game in the NCAA tournament since 1998 when they beat UNLV in the first round, 69-57.
Kansas
2010
32 States are represented
23
27
32
applesauce
applesauce
The 2012 NCAA men's basketball tournament included teams from 31 states and the District of Columbia.
49 out of the 50 states are represented in NCAA Division I Men's Basketball (Alaska is not). Of those 49 states, 18 were not represented in the 2012 NCAA Division I Men's Basketball Tournament. They are listed below.ArizonaArkansasDelawareGeorgiaHawaiiIdahoIllinoisLouisianaMaineMinnesotaNew HampshireNew JerseyNorth DakotaOklahomaOregonRhode IslandSouth CarolinaWyoming
29 States are represented along with the District of Columbia
Ohio. Ohio has 5 teams in the tourney
In 2013, assuming that's what you mean by "this year," the NCAA Men's basketball tournament included teams from 31 states and the District of Columbia.
There were no schools from New Jersey represented in the 2012 NCAA men's basketball tournament.