Gold City and Diamond Town are NOT real cities.
Usually no, but there are some exceptions, mostly in the names of some French towns.
york
Atwater
Dragon City
satellite towns are those towns already existing, that are developed to house the excess population of parent city. New towns are towns developed/planned on open/vacant land to decongest or to accommodate future/projected population.
Lancaster
paper towns are fake places.
cities and towns
Carlow.Leighlinbridge.Bagenalstown.Tullow.Kildavin.
Costa Bella
your mom's name
Mostly from their old Anglo-Saxon names but some like London, are drived from their Roman names (Londinium).
Hawaii green sox
Some may, some may not. Depends on what they are reporting or their history was. They use fake names either to keep their real name private or legal reason. Or maybe just for fun.
Shanty Towns
Some examples of fake government names could be "The Ministry of Silly Walks" (from the comedy sketch by Monty Python), "The Department of Utter Nonsense", or "The Bureau of Imaginary Affairs". These are fictional names often used for comedic or satirical purposes.
Manchester, NH Mankato, MN Mankato, KS