Hudson County is the most densely populated county in New Jersey and one of the most densely populated counties in the United States, at 14,974 residents per square mile (5,781/km²).
The only city in Hudson County among the 100 most populous cities in the United States was Jersey City, which was ranked 77th in the United States Census Bureau's rankings based on the 2016 population estimate.

Of municipalities with over 50,000 people, Union City is the most densely populated in the United States, while several Hudson County municipalities are among the most densely populated in the United States as well as worldwide.

North Hudson has the second-largest Cuban American population in the United States behind Miami.
Jersey City is the 21st-most ethnically diverse city in the United States and the most ethnically diverse on the East Coast of the United States.
Hudson has three communities on the list of the 100 cities (population 5,000 and up) with the highest percent of foreign-born residents: West New York (65.2%), Union City (58.7%), and Guttenberg (48.7%) Hudson County has the smallest proportion of persons over age 65 in New Jersey.

Advocates for the homeless counted 2,227 people without homes in Hudson County as of January 2008.
In 2009, the Hudson County Alliance to End Homelessness counted 1,779 homeless people.
The same number was counted in 2010.
Three homeless shelters are located in the county: Lucy's Shelter in Jersey City, Palisades Emergency Residence Corp. in Union City and the Hoboken Homeless Shelter in Hoboken.
Hudson County is the most densely populated county in New Jersey and one of the most densely populated counties in the United States, at 14,974 residents per square mile (5,781/km²). The only city in Hudson County among the 100 most populous cities in the United States was Jersey City, which was ranked 77th in the United States Census Bureau's rankings based on the 2016 population estimate.
Of municipalities with over 50,000 people, Union City is the most densely populated in the United States, while several Hudson County municipalities are among the most densely populated in the United States as well as worldwide.
North Hudson has the second-largest Cuban American population in the United States behind Miami.Jersey City is the 21st-most ethnically diverse city in the United States and the most ethnically diverse on the East Coast of the United States. Hudson has three communities on the list of the 100 cities (population 5,000 and up) with the highest percent of foreign-born residents: West New York (65.2%), Union City (58.7%), and Guttenberg (48.7%) Hudson County has the smallest proportion of persons over age 65 in New Jersey.
Advocates for the homeless counted 2,227 people without homes in Hudson County as of January 2008. In 2009, the Hudson County Alliance to End Homelessness counted 1,779 homeless people. The same number was counted in 2010. Three homeless shelters are located in the county: Lucy's Shelter in Jersey City, Palisades Emergency Residence Corp. in Union City and the Hoboken Homeless Shelter in Hoboken.
Hudson County, New Jersey