Doha (Arabic: الدوحة, transliteration: Ad-Dawḥah or Ad-Dōḥah) is the capital city of Qatar. With a population of 400,051 according to the 2005 census, it is located in the Ad Dawhah municipality on the Persian Gulf ( 25.3° N 51.5333° E). Doha is Qatar's largest city, with over 80% of the nation's population residing in Doha or its surrounding suburbs, and is the economic center of the country. Doha is home to the Education City, an area devoted to research and education.