Colfax is located in east Washington. Colfax is part of Whitman County. Colfax has 3.79 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Colfax population is 2,826, which has shrunk 0.63% 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%. Colfax median household income is $45,729 in 2010-2014 and has grown by 24.87% since 2000. The income growth rate is lower than the state average rate of 31.72% and is lower than the national average rate of 27.36%. Colfax median house value is $157,300 in 2010-2014 and has grown by 55.13% since 2000. The house value growth rate is about the same as 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 Colfax is much better than the state average in quality. The Colfax area code is 509.