Garrison is located in west Montana. Garrison is part of Powell County. Garrison has 9.63 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Garrison population is 63, which has shrunk 43.75% 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%. Garrison median household income is $39,375 in 2010-2014 and has grown by 18.42% since 2000. The income growth rate is much lower than the state average rate of 41.61% and is lower than the national average rate of 27.36%. Garrison median house value is $156,300 in 2010-2014 and has grown by 184.18% since 2000. The house value growth rate is much higher 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 Garrison is close to the state average in quality. The Garrison area code is 406.