Birkby is a hamlet in the Allerdale district of the English county of Cumbria, historically within Cumberland, near the Lake District National Park.[1] It is located on the A596 road, 1.6 miles (2.6 km) north-east of Maryport + 26.2 miles (42.2 km) south-west of Carlisle. In 1870-72 it had a population of 157.[2]