Waterville is a city located in Marshall County, Kansas. Waterville has a 2025 population of 648 . Waterville is currently declining at a rate of -0.31% annually and its population has decreased by -1.52% since the most recent census, which recorded a population of 658 in 2020.
The average household income in Waterville is $73,762 with a poverty rate of 3.88%. The median age in Waterville is 43.6 years: 46.2 years for males, and 43.2 years for females. For every 100 females there are 71.6 males.
Data after 2023 is projected based on recent change
The racial composition of Waterville includes 89.71% White, and smaller percentages for other race and multiracial populations.
White (89.71%)
Two or more races (7.75%)
Other race (2.54%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 671 | 89.71% |
| Two or more races | 58 | 7.75% |
| Other race | 19 | 2.54% |
Married
Widowed
Divorced
Separated
Never Married
Waterville's average per capita income is $35,750. Household income levels show a median of $70,625. The poverty rate stands at 3.88%.
Name | Median | Mean |
|---|---|---|
| Married Families | $76,557 | - |
| Families | $76,134 | $86,738 |
| Households | $70,625 | $73,762 |
| Non Families | $29,821 | $41,823 |
Average Income
Median Household Income
Poverty Rate