Cosmopolis is a city located in Washington. With a 2020 population of 1,683, it is the 175th largest city in Washington and the 8288th largest city in the United States. Cosmopolis is currently growing at a rate of 1.08% annually and its population has increased by 2.06% since the most recent census, which recorded a population of 1,649 in 2010. Spanning over 2 miles, Cosmopolis has a population density of 1,209 people per square mile.
The average household income in Cosmopolis is $63,034 with a poverty rate of 3.22%. The median rental costs in recent years comes to $935 per month, and the median house value is $151,200. The median age in Cosmopolis is 46.7 years, 43.9 years for males, and 48.6 years for females. For every 100 females there are 115.4 males.