Monaco has the second most roads per square mile.
United Arab Emirates.
Kansas gets the most tornadoes per square mile.
The country of China covers 3.7 million square miles. China has a population of over one billion people and is the most populated country in the world.
Best guess would be Monaco at about 45000 cars/sq mile although the whole country has about 10000 fewer cars than that and is only .76 sq miles.
Wales is said to contain the most castles per square mile in the world. With over 600 castles, Wales has a rich history of fortifications dating back to the medieval period.
The average population density for the World is 117.1 people per square mile. Of the populated countries Greenland has the lowest population density with 0.067 people per square mile however Antarctica is unpopulated. The most densely populated country in the World is Macau with 48,450 people per square mile closely followed by Monaco with 43,780 people per square mile
United Kingdom has the most people per square mile than any other major country in Europe. It's 395 people per sq. km. OR 1,023 people per sq. mile. Malta is even denser, but is small with 400,000 people.
The District of Columbia has the most lane-miles of highway per square mile (around 57). As for states, the highest number of lane-miles per square mile is Rhode Island at 13.
The country with the most churches per square mile is Malta. With over 360 churches in an area of just 122 square miles, Malta is known for its high concentration of churches.
Wyoming has the most farm land per square mile compared to other states in the United States.
Asia is the continent with the most people per square mile at 203. The second most densely populated continent is Europe at 134 people per square mile.