Aldie is an unincorporated community and census-designated place located between Chantilly and Middleburg in Loudoun County, Virginia, United States. The historic village of Aldie is located on the John Mosby Highway in a gap between the Catoctin Mountains and Bull Run Mountains, through which the Little River flows. Aldie traditionally serves as the gateway to the Loudoun Valley and beyond. The Aldie CDP was first drawn prior to the 2020 census and comprises solely the historic village.