Ottawa is located in east Kansas. Ottawa is part of Franklin County. Ottawa has 9.33 square miles of land area and 0.10 square miles of water area. As of 2010-2014, the total Ottawa population is 12,548, which has grown 5.26% since 2000. The population growth rate is lower than the state average rate of 7.24% and is much lower than the national average rate of 11.61%. Ottawa median household income is $43,828 in 2010-2014 and has grown by 28.64% since 2000. The income growth rate is about the same as the state average rate of 27.69% and is about the same as the national average rate of 27.36%. Ottawa median house value is $93,100 in 2010-2014 and has grown by 31.31% since 2000. The house value growth rate is much lower than the state average rate of 54.97% and is lower than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Ottawa is much better than the state average in quality. The Ottawa area code is 785.