Cobh Junction in Co.Cork is the location where the Youghal and Cobh lines part company. The line to Youghal was built by the Cork & Youghal Railway in the 1860s, but a junction was created here when it was decided to serve the important harbour at Cobh, and thus the Cobh line became the most important, while the Youghal branch was the secondary. Passenger services on the Youghal line ended in 1963, but the line remained in use for regular Sunday excursion and goods traffic until the late 1970s. By the 1980s, only IRRS and GAA special trains traversed the line, with the last GAA special train running in 1988. Since then the Youghal line became derelict, but now Irish Rail plan to reopen the Youghal line as far as Midleton as part of the commuter expansion around Cork City. Track clearences and preparation work has already begun on the line. See more at Irish Rail.

Cobh Junction station building is unusually a small wooden structure, which also houses the now 'switched out' signal cabin. The station retains its original footbridge and waiting shelter also, and there are even a couple of original GSWR benches.