Oso is located in northwest Washington. Oso is part of Snohomish County. Oso has 2.83 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Oso population is 122, which has shrunk 50.41% since 2000. The population growth rate is much lower than the state average rate of 17.05% and is much lower than the national average rate of 11.61%. Oso median household income is $34,659 in 2010-2014 and has has shrunk by 53.98% since 2000. The income growth rate is much lower than the state average rate of 31.72% and is much lower than the national average rate of 27.36%. Oso median house value is $281,300 in 2010-2014 and has shrunk by -75.70% since 2000. The house value growth rate is higher than the state average rate of 52.82% and is much higher 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 Oso is better than the state average in quality.