Ottawa township is located in Franklin County, Kansas. Ottawa township has a 2026 population of 38. Ottawa township is currently growing at a rate of 5.56% annually and its population has increased by 5.56% since the most recent census, which recorded a population of 36 in 2020.
The median age in Ottawa township is 44.8 years: 53.3 years for males, and 44.1 years for females. For every 100 females there are 135.3 males.