Somserset is part of the Frankford Elevated section of the line, which began service on November 5, 1922.

Between 1988 and 2003, SEPTA undertook a $493.3 million reconstruction of the 5.5-mile (8.9 km) Frankford Elevated.
Somerset station was completely rebuilt on the site of the original station; the project included new platforms, elevators, windscreens, and overpasses, and the station now meets ADA accessibility requirements.
The line had originally been built with track ballast and was replaced with precast sections of deck, allowing the station (and the entire line) to remain open throughout the project.

In 2007, Philadelphia Weekly named intersection underneath the station as one of the top ten "drug corners" in the city.

During the Market–Frankford's rush-hour skip-stop service pattern, Somerset was only served by "B" trains.
This practice was discontinued on February 24, 2020.
Somserset is part of the Frankford Elevated section of the line, which began service on November 5, 1922.
Between 1988 and 2003, SEPTA undertook a $493.3 million reconstruction of the 5.5-mile (8.9 km) Frankford Elevated. Somerset station was completely rebuilt on the site of the original station; the project included new platforms, elevators, windscreens, and overpasses, and the station now meets ADA accessibility requirements. The line had originally been built with track ballast and was replaced with precast sections of deck, allowing the station (and the entire line) to remain open throughout the project.
In 2007, Philadelphia Weekly named intersection underneath the station as one of the top ten "drug corners" in the city. 
During the Market–Frankford's rush-hour skip-stop service pattern, Somerset was only served by "B" trains. This practice was discontinued on February 24, 2020.
Somerset station (SEPTA)