2012 Regional League Division 2 Bangkok Metropolitan Region is the 4th season of the League competition since its establishment in 2009. It is in the third tier of the Thai football league system.
No club was promoted to the Thai Division 1 League. Last years league champions Kasetsart University and runners up North Bangkok College failed to qualify from the 2011 Regional League Division 2 championship pool.
RBAC Mittraphap, Samut Prakan Customs United and Thai Honda were relegated from the 2011 Thai Division 1 League.
Samut Sakhon re-located to the Regional League Bangkok Area Division from the Regional League Central-East Region 2011.
Maptaphut Rayong, Royal Thai Fleet, Thanyaburi United have all been moved into the Central-East Region 2012
Paknampho NSRU moved into the Division 2 League Northern Region 2012
Raj-Vithi have withdrawn from the 2012 campaign.
Central Lions (previously known as (North-Central) is returning to the league.