Waterville is a city in Marshall County, Kansas, United States. As of the 2010 census, the city population was 680.
Waterville is located at 39°41.5′N 96°45′W / 39.6917°N 96.75°W / 39.6917; -96.75. According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km²), all land.
As of the census of 2000, there were 681 people, 292 households, and 190 families residing in the city. The population density was 1,351.1 people per square mile (525.9/km²). There were 328 housing units at an average density of 650.7 per square mile (253.3/km²). The racial makeup of the city was 97.50% White, 0.29% Asian, 0.15% from other races, and 2.06% from two or more races. Hispanic or Latino of any race were 1.17% of the population.