Last official estimated population of Harper County was 3,691 (year 2014)[1]. This was 0.001% of total US population and 0.1% of total Oklahoma state population. Area of Harper County is 1,041.0 mi² (=2696.3 km²), in this year population density was 3.55 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Harper County population in 2026 would be 3,709 [0].
Historical population of Harper County for period 1880-2014 [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
[1880-1890] NAN %/yr
[1890-1900] +INF %/yr
[1900-1910] +0.12 %/yr
[1910-1920] -0.71 %/yr
[1920-1930] +0.18 %/yr
[1930-1940] -1.83 %/yr
[1940-1950] -0.76 %/yr
[1950-1960] -0.04 %/yr
[1960-1970] -1.44 %/yr
[1970-1980] -0.88 %/yr
[1980-1990] -1.48 %/yr
[1990-2000] -1.32 %/yr
[2000-2005] -0.57 %/yr
[2005-2010] +1.28 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Harper County? Visit this page: Settlements in Harper County, OK
Population of Harper County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 125 | 151 | 276 |
| 5 to 9 | 128 | 169 | 297 |
| 10 to 14 | 142 | 122 | 264 |
| 15 to 19 | 105 | 110 | 215 |
| 20 to 24 | 117 | 100 | 217 |
| 25 to 29 | 84 | 80 | 164 |
| 30 to 34 | 125 | 131 | 256 |
| 35 to 39 | 131 | 105 | 236 |
| 40 to 44 | 93 | 84 | 177 |
| 45 to 49 | 108 | 107 | 215 |
| 50 to 54 | 158 | 141 | 299 |
| 55 to 59 | 145 | 124 | 269 |
| 60 to 64 | 132 | 118 | 250 |
| 65 to 69 | 76 | 93 | 169 |
| 70 to 74 | 74 | 68 | 142 |
| 75 to 79 | 49 | 88 | 137 |
| 80 to 84 | 59 | 75 | 134 |
| 85+ | 35 | 60 | 95 |
Harper 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 | 1836 | 1890 | 3,726 |
| WA | 1807 | 1850 | 3,657 |
| NH | 1477 | 1565 | 3,042 |
| NHWAC | 1451 | 1542 | 2,993 |
| NHWA | 1430 | 1510 | 2,940 |
| H | 409 | 361 | 770 |
| HWAC | 385 | 348 | 733 |
| HWA | 377 | 340 | 717 |
| IAC | 51 | 49 | 100 |
| TOM | 32 | 43 | 75 |
| NHIAC | 33 | 33 | 66 |
| NHTOM | 23 | 35 | 58 |
| IA | 32 | 23 | 55 |
| BAC | 18 | 20 | 38 |
| HIAC | 18 | 16 | 34 |
| NHIA | 20 | 12 | 32 |
| NHBAC | 12 | 16 | 28 |
| HIA | 12 | 11 | 23 |
| HTOM | 9 | 8 | 17 |
| AAC | 6 | 8 | 14 |
| NHAAC | 4 | 8 | 12 |
| NAC | 8 | 2 | 10 |
| HBAC | 6 | 4 | 10 |
| NA | 8 | 1 | 9 |
| BA | 5 | 4 | 9 |
| HNAC | 7 | 1 | 8 |
| HNA | 7 | 1 | 8 |
| NHAA | 2 | 5 | 7 |
| AA | 2 | 5 | 7 |
| HBA | 4 | 1 | 5 |
| NHBA | 1 | 3 | 4 |
| HAAC | 2 | 0 | 2 |
| NHNAC | 1 | 1 | 2 |
| NHNA | 1 | 0 | 1 |
| HAA | 0 | 0 | 0 |
• Woodward County population
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• Barber County
61.3 mi, 
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• Meade County
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• Ellis County
40.1 mi, 
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• Lipscomb County
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• Kiowa County
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• Clark County
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• Comanche County
34.8 mi, 
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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
*Woodward Oklahoma Notes
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