Index is located close to the center of Washington. Index is part of Snohomish County. Index has 0.23 square miles of land area and has no water area. As of 2010-2014, the total Index population is 217, which has grown 38.22% 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%. Index median household income is $55,313 in 2010-2014 and has grown by 28.26% since 2000. The income growth rate is lower than the state average rate of 31.72% and is about the same as the national average rate of 27.36%. Index median house value is $185,000 in 2010-2014 and has grown by 68.64% since 2000. The house value growth rate is higher than the state average rate of 52.82% and is 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 Index is much better than the state average in quality. The Index area code is 360.