The 2014–15 Welsh Alliance League, known as the Lock Stock Welsh Alliance League for sponsorship reasons, is the 31st season of the Welsh Alliance League, which consists of two divisions: the third and fourth levels of the Welsh football pyramid.
The season began on 9 August 2014 and concluded on 4 May 2015 with Holywell Town as Division 1 champions.
In Division 2, St Asaph City were champions with Llangefni Town and Trearddur Bay finishing second and third place, respectively.
Denbigh Town were champions in the previous season and were promoted to the Cymru Alliance.
Penrhyndeudraeth were champions in the previous season and were promoted to Division 1 along with runners-up, Kinmel Bay Sports.