Horncastle is an English market town and also civil parish in Lincolnshire, 17 miles (27 kilometres) eastern of the county town of Lincoln. It had a population of 6,815 according to the 2011 Census. A section 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 major nationwide magazine publisher of timeless motorcycles, aviation and also roadway transport heritage titles, positioned in the south of the town on the industrial estate off the A153 (Boston Road). Considering that the late 20th century, the population has enhanced to 6,815 in 2011, its highest possible ever. Historically, the civil parish endured a decline in population from the mid-19th to mid-20th century, as urbanisation and modifications in agriculture drew in people to cities where more job was available.