Harrington Junction was a railway junction in Harrington, Cumbria, England. It joined three branches to the Cleator and Workington Junction Railway's (CWJR) main line from Workington Central to Moor Row via Cleator Moor West. No station ever existed at the junction, High Harrington was the nearest, 48 chains (0.97 km) to the south.
Former employees described the junction as the CWJR's "nerve centre".
The main line was one of the fruits of the rapid industrialisation of West Cumberland in the second half of the nineteenth century, specifically being born as a reaction to oligopolistic behaviour by the London and North Western and Whitehaven, Cleator and Egremont Railways.
All lines in the area were primarily aimed at mineral traffic, notably iron ore, coal and limestone, none more so than the new line to Workington, which earned the local name "The Track of the Ironmasters". General goods and passenger services were provided, but were very small beer compared with mineral traffic.
The founding Act of Parliament of June 1878 confirmed the company's agreement with the Furness Railway that the latter would operate the line for one third of the receipts.
Three lines joined the main line at Harrington Junction:
The layout was such that trains could travel from the Harrington Branch onto the Moss Bay Branch or the Derwent Branch without going onto the main line.
There were five sidings on each side of the main line, four beside the lines to the steel works and a further four beside the Lowca line, together with other equipment such as cranes, signalboxes and a control cabin.
Mineral traffic started along the main line in July 1879, along with the branches towards Lowca and Derwent Ironworks. The Moss Bay branch followed in December 1885, being extended to Harrington Harbour in July 1893.
Harrington Junction was about mineral and industrial traffic. The line's peak year was 1909, with lots of traffic generated between 1914 and 1918.