Waterville is a city located in Washington. With a 2020 population of 1,225, it is the 194th largest city in Washington and the 9498th largest city in the United States. Waterville is currently growing at a rate of 0.49% annually and its population has increased by 7.64% since the most recent census, which recorded a population of 1,138 in 2010. Waterville reached it's highest population of 1,225 in 2021. Spanning over 1 miles, Waterville has a population density of 1,416 people per square mile.
The average household income in Waterville is $73,565 with a poverty rate of 1.87%. The median rental costs in recent years comes to $743 per month, and the median house value is $174,000. The median age in Waterville is 43.5 years, 43.4 years for males, and 43.6 years for females. For every 100 females there are 115.5 males.