Rosalia is a city located in Washington. With a 2020 population of 546, it is the 233rd largest city in Washington and the 12934th largest city in the United States. Rosalia is currently declining at a rate of -1.09% annually and its population has decreased by -0.73% since the most recent census, which recorded a population of 550 in 2010. Rosalia reached it's highest population of 567 in 2017. Spanning over 1 miles, Rosalia has a population density of 869 people per square mile.
The average household income in Rosalia is $62,392 with a poverty rate of 17.11%. The median rental costs in recent years comes to $663 per month, and the median house value is $118,400. The median age in Rosalia is 46.1 years, 46.1 years for males, and 46.1 years for females. For every 100 females there are 79.4 males.