Over Burrow Roman Fort is the modern name given to a former Roman fort at Over Burrow (or Burrow-in-Londsale), Lancashire in North West England. Today it is the site of the 18th-century country house Burrow Hall. The first castra is thought to have been founded in the first century AD within the Roman province of Britannia.
The fort's Roman name is not known, but is assumed to be one of those recorded in Route X of the Antonine Itinerary. Galacum or Calacum, originally conjectured by William Camden, was still being proposed in 1979. However, in 1998 David Shotter suggested that Galacum would be more appropriately applied to Lancaster and Alone (previously assigned to Watercrook in Cumbria) for Over Burrow. Camden also associated the site with Ptolemy's Καλαγον, one of the cities of the Brigantes.