Castlecary () is a small, historic, village in North Lanarkshire, Scotland. It has long been associated with infrastructure, being adjacent to a bridged river, a Roman fort and roads, a nationwide canal, a Victorian railway viaduct, and a modern motorway. Castlecary is close to the town of Cumbernauld but like Dullatur and Luggiebank is not officially part of the town. Around 1725, the barony of Castlecary, with a population of just seventeen families, was disjoined from the parish of Falkirk, and annexed to Cumbernauld quoad sacra. Castlecary is also near Allandale which, though in the Falkirk council area, was built for Castlecary fireclay workers.