Last official estimated population of Boulder city (Jefferson County**, Montana state) was 1,202 (year 2014)[1]. This was 0% of total US population and 0.12% of total Montana state population. Area of Boulder city is 1.1 mi² (=2.9 km²)[6], in this year population density was 1,069.40 p/mi². If population growth rate would be same as in period 2010-2014 (+0.4%/yr), Boulder city population in 2024 would be 1,251*.
Historical population of Boulder city for period 1880-2014:
Estimated population for 2014[1]. Click on flag to hide it.
Population • Legends • Position
[1880-1920] +2.94 %/yr
[1920-1930] +3.11 %/yr
[1930-1940] -5.79 %/yr
[1940-1950] +7.15 %/yr
[1950-1960] +3.2 %/yr
[1960-1970] -0.38 %/yr
[1970-1980] +0.71 %/yr
[1980-1990] -0.97 %/yr
[1990-2000] +0.24 %/yr
[2000-2005] -1.35 %/yr
[2005-2010] -1.11 %/yr
[2010-2014] +0.4 %/yr
• Butte-Silver Bow (balance) population
35 mi, 
227°
• Helena city
25.3 mi, 
10°
• Deer Lodge city
31.3 mi, 
290°
• East Helena city
25.9 mi, 
21°
• Townsend city
29.3 mi, 
78°
• Three Forks city
36.2 mi, 
131°
• Manhattan town
45.7 mi, 
124°
• Whitehall town
25.2 mi, 
177°
• Walkerville town
24.4 mi, 
235°
• Twin Bridges town
49 mi, 
192°
*Calculated by population.us from last known population growth rate, not official data.
**Some cities are placed on more than one county. Only 1 county is shown.
[1] Cities and Towns (Incorporated Places and Minor Civil Divisions) 2014, archived from the original, retrieved 02/23/2016
[2] City and Town Intercensal Estimates (2000-2010), archived from the original, retrieved 02/23/2016
[3] Places: 1990 and 1999 Populations, With Numeric and Percent Population Change, archived from the original, retrieved 02/23/2016
[4] Population of the 100 Largest Urban Places: 1980,
[5] Population of the 100 Largest Urban Places in history,
[6] Area, latitude longitude data, retrieved 02/23/2016
[7] Through the Decades, Overview 1790-2010, PDF, large files! >100 Mb
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