Zillah is a city located in Washington. With a 2020 population of 3,161, it is the 141st largest city in Washington and the 6089th largest city in the United States. Zillah is currently growing at a rate of 0.19% annually and its population has increased by 6.65% since the most recent census, which recorded a population of 2,964 in 2010. Spanning over 2 miles, Zillah has a population density of 1,739 people per square mile.
The average household income in Zillah is $71,194 with a poverty rate of 15.46%. The median rental costs in recent years comes to $933 per month, and the median house value is $170,800. The median age in Zillah is 33.2 years, 35.9 years for males, and 32.1 years for females. For every 100 females there are 106.6 males.