Westby is located in east Montana. Westby is part of Sheridan County. Westby has 0.54 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Westby population is 168, which has shrunk 2.33% since 2000. The population growth rate is much lower than the state average rate of 11.55% and is much lower than the national average rate of 11.61%. Westby median household income is $20,000 in 2010-2014 and has has shrunk by 39.16% since 2000. The income growth rate is much lower than the state average rate of 41.61% and is much lower than the national average rate of 27.36%. Westby median house value is $46,000 in 2010-2014 and has shrunk by -76.25% since 2000. The house value growth rate is lower than the state average rate of 88.54% 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 Westby is much better than the state average in quality. The Westby area code is 406.