Ottawa is located in Franklin County, Kansas. Ottawa has a 2025 population of 841 . It is also the county seat of Franklin County . Ottawa is currently growing at a rate of 0.48% annually and its population has increased by 2.19% since the most recent census, which recorded a population of 823 in 2020.
The average household income in Ottawa is $96,455 with a poverty rate of 2.75%. The median age in Ottawa is 49.3 years: 51 years for males, and 46.8 years for females. For every 100 females there are 115.6 males.
Data after 2023 is projected based on recent change
The racial composition of Ottawa includes 94.35% White, and smaller percentages for Two or more races, other race and multiracial populations.
White (94.35%)
Two or more races (2.9%)
Other race (2.75%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 651 | 94.35% |
| Two or more races | 20 | 2.9% |
| Other race | 19 | 2.75% |
Married
Widowed
Divorced
Separated
Never Married
Ottawa's average per capita income is $32,589. Household income levels show a median of $85,846. The poverty rate stands at 2.75%.
Name | Median | Mean |
|---|---|---|
| Families | $87,243 | $113,299 |
| Married Families | $87,243 | - |
| Households | $85,846 | $96,455 |
| Non Families | - | $38,977 |
Average Income
Median Household Income
Poverty Rate