According to the 2005 census, 3,672 residents enjoy calling Sweet Grass County home, an increase of 1.7% from the 2000 census. Total population in Montana reached 935,670 in 2005, a 3.7% increase since the 2000 census. The population of Big Timber is 1,650. Sweet Grass County boasts 1,907 housing units, while Big Timber upholds 812 housing units. Although Sweet Grass County is experiencing relatively moderate population growth, the total population still falls more than 1,200 people short of its 1920 population of over 4,900.