Home United Kingdom. As shown in the given London location map that London is located on Thames River in the south-east region of England, United Kingdom. London is the capital city of country England as well as United Kingdom.urthermore, London is a global city that leads in terms including finance, arts, commerce, education, entertainment, fashion, healthcare, media, professional services, research and development, tourism. As per the report, London is the city that receives the most international visitors of any city in the world.