Monaco is #1 with a rating of more than 41,000 people per square mile. Singapore is second with a rating of over 16,500 people per square mile.
China has the largest population in the world and India is second but neither has the highest density (the rating of people per square mile)
China is 53rd in the world for density, India ranks at 18th with just over 1,080,000,000 people spread over 1,269,000 square miles. India's density rating is 851 people per square mile, similar to Japan's rating of 873 people per square mile (Japan being 1/10 the population of India, but not quite 1/10th its land mass)
portugal and united kingdom
Tamanrasset's population density is 2 people per square kilometer.
Hamarøy's population density is 2 people per square kilometer.
The population density of Forsand is 2 people per square kilometer.
The population density of Nissedal is 2 people per square kilometer.
The population density of Dovre is 2 people per square kilometer.
Trysil's population density is 2 people per square kilometer.
The population density of Hjartdal is 2 people per square kilometer.
The population density of Målselv is 2 people per square kilometer.
The population density of Suldal is 2 people per square kilometer.
Tysfjord's population density is 2 people per square kilometer.
The population density of Flå is 2 people per square kilometer.