The 2010 Under-21 Provincial Championship Group A was contested from 3 July to 30 October 2010. The tournament (also known as the ABSA Under-21 Provincial Championship for sponsorship reasons) was the top tier of 2010 edition of the Under-21 Provincial Championship, an annual Under-21 inter-provincial rugby union competition featuring fourteen South African provincial unions. The tournament was won by Western Province U21; they beat Blue Bulls U21 43–32 in the final played on 30 October 2010. Boland U21 were relegated to Group B for 2011.