AD is the abbreviation for Andorra, the 178th largest country in the world. Officially Principality of Andorra, Andorra is a country located in western Europe, bordering France and Spain. The capital city of Andorra is Andorra la Vella and major cities include Andorra la Vella (population: 22,256), Escaldes-Engordany (population: 14,395), Encamp (population: 13,521), Sant Julià de Lòria (population: 7,518), La Massana (population: 4,987), Santa Coloma (population: 2,937), Ordino (popu...