Markham is located in west Washington. Markham is part of Grays Harbor County. Markham has 1.12 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Markham population is 153, which has grown 61.05% 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%. Markham median household income is $100,329 in 2010-2014 and has grown by 57.38% since 2000. The income growth rate is much higher than the state average rate of 31.72% and is much higher than the national average rate of 27.36%. Markham median house value is $59,900 in 2010-2014. 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 Markham is close to the state average in quality.