Last official estimated population of Phillips County was 4,266 (year 2014)[1]. This was 0.001% of total US population and 0.4% of total Montana state population. Area of Phillips County is 5,212.0 mi² (=13499.1 km²), in this year population density was 0.82 p/mi². If population growth rate would be same as in period 2010-2014 (+0.08%/yr), Phillips County population in 2025 would be 4,302 [0].
Historical population of Phillips 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] -1.25 %/yr
[1930-1940] -0.39 %/yr
[1940-1950] -2.18 %/yr
[1950-1960] -0.5 %/yr
[1960-1970] -1.12 %/yr
[1970-1980] -0.04 %/yr
[1980-1990] -0.39 %/yr
[1990-2000] -1.15 %/yr
[2000-2005] -1.68 %/yr
[2005-2010] +0.12 %/yr
[2010-2014] +0.08 %/yr
Looking for settlements in Phillips County? Visit this page: Settlements in Phillips County, MT
Population of Phillips County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 126 | 130 | 256 |
| 5 to 9 | 125 | 138 | 263 |
| 10 to 14 | 131 | 126 | 257 |
| 15 to 19 | 143 | 114 | 257 |
| 20 to 24 | 135 | 109 | 244 |
| 25 to 29 | 75 | 83 | 158 |
| 30 to 34 | 114 | 114 | 228 |
| 35 to 39 | 107 | 101 | 208 |
| 40 to 44 | 86 | 73 | 159 |
| 45 to 49 | 119 | 115 | 234 |
| 50 to 54 | 184 | 210 | 394 |
| 55 to 59 | 175 | 180 | 355 |
| 60 to 64 | 167 | 154 | 321 |
| 65 to 69 | 126 | 131 | 257 |
| 70 to 74 | 79 | 103 | 182 |
| 75 to 79 | 92 | 79 | 171 |
| 80 to 84 | 48 | 63 | 111 |
| 85+ | 50 | 87 | 137 |
Phillips 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 | 2040 | 2063 | 4,103 |
| WAC | 1901 | 1919 | 3,820 |
| NHWAC | 1867 | 1880 | 3,747 |
| WA | 1831 | 1823 | 3,654 |
| NHWA | 1800 | 1785 | 3,585 |
| IAC | 221 | 262 | 483 |
| NHIAC | 214 | 253 | 467 |
| IA | 171 | 181 | 352 |
| NHIA | 166 | 173 | 339 |
| TOM | 72 | 98 | 170 |
| NHTOM | 69 | 97 | 166 |
| H | 42 | 47 | 89 |
| HWAC | 34 | 39 | 73 |
| HWA | 31 | 38 | 69 |
| AAC | 17 | 15 | 32 |
| NHAAC | 13 | 15 | 28 |
| BAC | 15 | 11 | 26 |
| NHBAC | 14 | 11 | 25 |
| HIAC | 7 | 9 | 16 |
| HIA | 5 | 8 | 13 |
| AA | 5 | 7 | 12 |
| NHAA | 2 | 7 | 9 |
| HAAC | 4 | 0 | 4 |
| HTOM | 3 | 1 | 4 |
| HAA | 3 | 0 | 3 |
| NHBA | 2 | 1 | 3 |
| BA | 2 | 1 | 3 |
| NAC | 1 | 2 | 3 |
| NHNAC | 1 | 2 | 3 |
| NA | 1 | 0 | 1 |
| NHNA | 1 | 0 | 1 |
| HBAC | 1 | 0 | 1 |
| HNAC | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Hill County population
103.2 mi, 
284°
• Fergus County
93 mi, 
220°
• Valley County
58.2 mi, 
83°
• Blaine County
49.3 mi, 284°
• Chouteau County
118.4 mi, 
257°
• Musselshell County
122.9 mi, 
191°
• Daniels County
115.5 mi, 
71°
• McCone County
109.3 mi, 
113°
• Garfield County
80 mi, 
146°
• Petroleum County
77.8 mi, 190°
[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
*Valley, Chouteau Montana Notes
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