Riverside is located in northeast Washington. Riverside is part of Okanogan County. Riverside has 0.97 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Riverside population is 451, which has grown 29.60% since 2000. The population growth rate is much higher than the state average rate of 17.05% and is much higher than the national average rate of 11.61%. Riverside median household income is $32,227 in 2010-2014 and has grown by 39.36% since 2000. The income growth rate is higher than the state average rate of 31.72% and is higher than the national average rate of 27.36%. Riverside median house value is $99,700 in 2010-2014 and has grown by 34.01% since 2000. The house value growth rate is much lower than the state average rate of 52.82% 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 Riverside is worse than the state average in quality. The Riverside area code is 509.