Last official estimated population of Phillips County was 4,460 (year 2014)[1]. This was 0.001% of total US population and 0.1% of total Colorado state population. Area of Phillips County is 688.0 mi² (=1782 km²), in this year population density was 6.48 p/mi². If population growth rate would be same as in period 2010-2014 (+0.1%/yr), Phillips County population in 2026 would be 4,514 [0].
Historical population of Phillips County for period 1890-2014 [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

[1890-1900] -4.99 %/yr
[1900-1910] +7.22 %/yr
[1910-1920] +5.63 %/yr
[1920-1930] +0.53 %/yr
[1930-1940] -1.57 %/yr
[1940-1950] -0.05 %/yr
[1950-1960] -1.03 %/yr
[1960-1970] -0.72 %/yr
[1970-1980] +0.95 %/yr
[1980-1990] -0.81 %/yr
[1990-2000] +0.69 %/yr
[2000-2005] -0.08 %/yr
[2005-2010] -0.11 %/yr
[2010-2014] +0.1 %/yr
Looking for settlements in Phillips County? Visit this page: Settlements in Phillips County, CO
Population of Phillips County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 148 | 116 | 264 |
| 5 to 9 | 168 | 139 | 307 |
| 10 to 14 | 147 | 155 | 302 |
| 15 to 19 | 133 | 133 | 266 |
| 20 to 24 | 127 | 140 | 267 |
| 25 to 29 | 98 | 107 | 205 |
| 30 to 34 | 124 | 120 | 244 |
| 35 to 39 | 113 | 99 | 212 |
| 40 to 44 | 110 | 120 | 230 |
| 45 to 49 | 144 | 115 | 259 |
| 50 to 54 | 156 | 143 | 299 |
| 55 to 59 | 165 | 160 | 325 |
| 60 to 64 | 136 | 139 | 275 |
| 65 to 69 | 112 | 107 | 219 |
| 70 to 74 | 87 | 97 | 184 |
| 75 to 79 | 77 | 101 | 178 |
| 80 to 84 | 56 | 88 | 144 |
| 85+ | 61 | 122 | 183 |
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 |
| WAC | 2100 | 2150 | 4,250 |
| WA | 2072 | 2123 | 4,195 |
| NH | 1702 | 1763 | 3,465 |
| NHWAC | 1658 | 1729 | 3,387 |
| NHWA | 1633 | 1708 | 3,341 |
| H | 460 | 438 | 898 |
| HWAC | 442 | 421 | 863 |
| HWA | 439 | 415 | 854 |
| BAC | 48 | 20 | 68 |
| TOM | 31 | 29 | 60 |
| IAC | 21 | 38 | 59 |
| NHBAC | 34 | 15 | 49 |
| NHTOM | 26 | 22 | 48 |
| BA | 33 | 9 | 42 |
| AAC | 22 | 20 | 42 |
| NHAAC | 20 | 17 | 37 |
| NHIAC | 15 | 22 | 37 |
| IA | 13 | 23 | 36 |
| NHBA | 22 | 6 | 28 |
| NHAA | 12 | 15 | 27 |
| AA | 12 | 15 | 27 |
| HIAC | 6 | 16 | 22 |
| HBAC | 14 | 5 | 19 |
| NHIA | 8 | 10 | 18 |
| HIA | 5 | 13 | 18 |
| HBA | 11 | 3 | 14 |
| HTOM | 5 | 7 | 12 |
| NAC | 4 | 2 | 6 |
| NHNAC | 3 | 2 | 5 |
| HAAC | 2 | 3 | 5 |
| NA | 1 | 2 | 3 |
| NHNA | 1 | 2 | 3 |
| HNAC | 1 | 0 | 1 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
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[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
*Weld Colorado Notes
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