Last official estimated population of Powder River County was 1,728 (year 2014)[1]. This was 0.001% of total US population and 0.2% of total Montana state population. Area of Powder River County is 3,298.8 mi² (=8543.9 km²), in this year population density was 0.52 p/mi². If population growth rate would be same as in period 2010-2014 (-0.22%/yr), Powder River County population in 2026 would be 1,684 [0].
Historical population of Powder River County for period 1920-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1920-1930] +1.53 %/yr
[1930-1940] -2.11 %/yr
[1940-1950] -1.58 %/yr
[1950-1960] -0.8 %/yr
[1960-1970] +1.42 %/yr
[1970-1980] -1.26 %/yr
[1980-1990] -1.85 %/yr
[1990-2000] -1.17 %/yr
[2000-2005] -1.32 %/yr
[2005-2010] +0.05 %/yr
[2010-2014] -0.22 %/yr
Looking for settlements in Powder River County? Visit this page: Settlements in Powder River County, MT
Population of Powder River County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 22 | 27 | 49 |
| 5 to 9 | 52 | 44 | 96 |
| 10 to 14 | 48 | 40 | 88 |
| 15 to 19 | 62 | 63 | 125 |
| 20 to 24 | 62 | 43 | 105 |
| 25 to 29 | 46 | 23 | 69 |
| 30 to 34 | 33 | 38 | 71 |
| 35 to 39 | 33 | 43 | 76 |
| 40 to 44 | 38 | 43 | 81 |
| 45 to 49 | 57 | 51 | 108 |
| 50 to 54 | 85 | 87 | 172 |
| 55 to 59 | 75 | 85 | 160 |
| 60 to 64 | 91 | 72 | 163 |
| 65 to 69 | 71 | 59 | 130 |
| 70 to 74 | 38 | 51 | 89 |
| 75 to 79 | 42 | 38 | 80 |
| 80 to 84 | 18 | 39 | 57 |
| 85+ | 29 | 35 | 64 |
Powder River County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 883 | 865 | 1,748 |
| WAC | 885 | 860 | 1,745 |
| NHWAC | 867 | 848 | 1,715 |
| WA | 872 | 838 | 1,710 |
| NHWA | 854 | 826 | 1,680 |
| IAC | 23 | 31 | 54 |
| NHIAC | 22 | 27 | 49 |
| H | 19 | 16 | 35 |
| NHTOM | 13 | 22 | 35 |
| TOM | 13 | 22 | 35 |
| IA | 16 | 18 | 34 |
| HWA | 18 | 12 | 30 |
| HWAC | 18 | 12 | 30 |
| NHIA | 15 | 14 | 29 |
| NHBAC | 3 | 7 | 10 |
| BAC | 3 | 7 | 10 |
| AAC | 4 | 5 | 9 |
| NHAAC | 4 | 5 | 9 |
| HIAC | 1 | 4 | 5 |
| HIA | 1 | 4 | 5 |
| NHAA | 1 | 2 | 3 |
| AA | 1 | 2 | 3 |
| BA | 0 | 1 | 1 |
| NHBA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| NHNAC | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| NAC | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HBAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Campbell County population
84.1 mi, 
178°
• Sheridan County
77.9 mi, 
236°
• Big Horn County
95.2 mi, 
269°
• Custer County
58.9 mi, 
0°
• Rosebud County
75.2 mi, 
314°
• Crook County
74.4 mi, 
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• Fallon County
83.7 mi, 
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• Prairie County
97 mi, 1°
• Carter County
50.9 mi, 
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• Treasure County
99.8 mi, 
303°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Custer Montana Notes
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