Kentuckys most densely populated county is Jefferson.It has more than twice the populous as the second largest county Fayette.
Lexington
san diego
San Francisco, followed by Orange county at a pretty distant second.
Polk County whose county seat is Des Moines has the largest population and is the most densely populated.
The most densely populated area in Russia is the city of Moscow and most densely populated area in Europe is the city of Paris.
Netherlands is the most densely populated country in the world
With a population density of almost 71,000 people per square mile, the borough of Manhattan (known as New York County in state government) is the most densely populated borough of New York City, and also the most densely populated county in the United States. It is one of the most densely populated places in the world. With 2.5 million residents, the borough of Brooklyn (Kings County) is the most populous borough of New York City, and also the most populous county in New York State.
New Jersey is the United State's most densely populated state.
Metropolitan areas of Pakistan are the most densely areas. Karachi is the most densely populated city of Pakistan.
Arkansas is the 34th most densely populated state in the U.S.
The most densely populated area in Brazil is called Sao Paulo.
The most densely populated sovereign nation is Monaco, with a population density of 16754.