The 2010 format of the National Hurling League is a system consisting of five divisions.
Limerick, who lost all of their group stage matches, were relegated from Division 1.
Wexford won Division 2 and secured promotion to the top tier.
Final Clare and Kildare entered Division 2 as the respective relegated and promoted teams from the 2009 season.
[6] Kildare were relegated from Division 2 after losing all but one of their group stage matches.
Final Kerry and London entered Division 3A as the respective relegated and promoted teams from the 2010 season.
On 10 April 2010, Kerry won the title following a 2–18 to 1–15 win over Derry in the final.
[7] Mayo were relegated from Division 3A after losing all but one of their group stage matches.