Horncastle is an English market community and civil parish in Lincolnshire, 17 miles (27 kilometres) east of the county town of Lincoln. It had a population of 6,815 according to the 2011 Census. An area of the ancient Roman walls continues to be. Lincolnshire Integrated Voluntary Emergency Service is based at the Boston Road Industrial Estate. The Lincolnshire Wildlife Trust is based in Banovallum House. Mortons of Horncastle is a significant nationwide magazine publisher of classic bikes, aeronautics and also road transport heritage titles, located in the south of the town on the industrial estate off the A153 (Boston Road). Considering that the late 20th century, the populace has boosted to 6,815 in 2011, its greatest ever before. Historically, the civil parish suffered a decline in population from the mid-19th to mid-20th century, as urbanisation as well as changes in agriculture drew in individuals to cities where a lot more work was offered.