Auburn 18
butler
The current longest winning streak in boys high school basketball, is True Divine Word Academy of St. Louis, MO. They are a small christian academy.
UCLA has the longest overall winning streak. However the Butler Bulldogs have the longest CURRENT winning streak in men's division 1 college basketball. As of 3/26/2010 Butler has 23 consecutive wins.
as of 12/02/2010, Kansas has the longest current home winning streak at 64 games. Current (prior to KU's win against UCLA as of this writing) can be found at http://web1.ncaa.org/stats/StatsSrv/rankings?sportCode=MBB&doWhat=showstreaks&division=1 For all-time streaks, here is a quasi answer, but Kentucky IMHO should have an asterisk as they have a history of being less than honorable during these years. http://www.mikebond.org/2009/11/21/top-ten-ncaa-college-basketball-home-winning-streaks/
The longest winning streak by a junior varsity basketball girls team was 80 strait games by a school in Akron, Ohio. It is worthy to consider that many schools do not report these streaks for this level, so there could be an unreported streak that is higher.
There is no winning streak in the tournament as Ky the 2012 champion did not make the tournament this year.
Akron Zips 10
Uconn
Conn
Houston Rockets 22 winning streak
UCLA's 88 game win streak is the longest in mens basketball