Unlike many country towns in New Zealand, Mount Somers' economy has not been solely agricultural. Coal, clay, sand, and limestone have been mined in the hills behind the town, and from 1885 until 1968 the community and its industries were served by the Mount Somers Branch railway from the Main South Line. From 1889 to 1957 an extension ran to Springburn, and the branch was sometimes known as the Springburn Branch. From Mount Somers railway station a private bush tramway ran into the hills behind the town, providing access to the various industrial operations there. Relics of both the railway and tramway are still visible today.
