The 2012 Martyr's Memorial A-Division League season, also known as the Martyrs' Memorial Red Bull 'A' Division League Football Tournament 2012 for sponsorship reasons, was the 40th season of Nepal's Martyr's Memorial A-Division League since its establishment in 1954/55. A total of 16 teams competed in the league. The season began on 20 November 2012 and concluded on 1 April 2013. Nepal Police Club were the defending champions, having won their fourth A- Division League title the previous season.
After the season, New Road Team would be relegated to 2016 Martyr's Memorial B-Division League for financial difficulties.
The top eight teams qualified for the Super League.