Last official estimated population of Oliver County was 1,833 (year 2014)[1]. This was 0.001% of total US population and 0.2% of total North Dakota state population. Area of Oliver County is 731.2 mi² (=1893.8 km²), in this year population density was 2.51 p/mi². If population growth rate would be same as in period 2010-2014 (-0.18%/yr), Oliver County population in 2026 would be 1,795 [0].
Historical population of Oliver 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] +7.87 %/yr
[1900-1910] +13.71 %/yr
[1910-1920] +2.15 %/yr
[1920-1930] -0.37 %/yr
[1930-1940] -0.99 %/yr
[1940-1950] -2.19 %/yr
[1950-1960] -1.68 %/yr
[1960-1970] -1.16 %/yr
[1970-1980] +0.72 %/yr
[1980-1990] -0.47 %/yr
[1990-2000] -1.45 %/yr
[2000-2005] -1.5 %/yr
[2005-2010] -0.65 %/yr
[2010-2014] -0.18 %/yr
Looking for settlements in Oliver County? Visit this page: Settlements in Oliver County, ND
Population of Oliver County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 47 | 73 | 120 |
| 5 to 9 | 53 | 61 | 114 |
| 10 to 14 | 63 | 46 | 109 |
| 15 to 19 | 58 | 52 | 110 |
| 20 to 24 | 44 | 53 | 97 |
| 25 to 29 | 50 | 28 | 78 |
| 30 to 34 | 52 | 44 | 96 |
| 35 to 39 | 44 | 43 | 87 |
| 40 to 44 | 40 | 38 | 78 |
| 45 to 49 | 61 | 54 | 115 |
| 50 to 54 | 72 | 84 | 156 |
| 55 to 59 | 90 | 87 | 177 |
| 60 to 64 | 93 | 74 | 167 |
| 65 to 69 | 64 | 66 | 130 |
| 70 to 74 | 44 | 39 | 83 |
| 75 to 79 | 28 | 20 | 48 |
| 80 to 84 | 26 | 17 | 43 |
| 85+ | 17 | 25 | 42 |
Oliver 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 | 926 | 877 | 1,803 |
| WAC | 911 | 868 | 1,779 |
| WA | 900 | 860 | 1,760 |
| NHWAC | 893 | 846 | 1,739 |
| NHWA | 882 | 838 | 1,720 |
| IAC | 32 | 34 | 66 |
| NHIAC | 31 | 29 | 60 |
| IA | 28 | 30 | 58 |
| NHIA | 27 | 25 | 52 |
| H | 20 | 27 | 47 |
| HWA | 18 | 22 | 40 |
| HWAC | 18 | 22 | 40 |
| TOM | 11 | 8 | 19 |
| NHTOM | 11 | 8 | 19 |
| BAC | 9 | 4 | 13 |
| NHBAC | 8 | 4 | 12 |
| AAC | 4 | 5 | 9 |
| NHAAC | 4 | 5 | 9 |
| BA | 5 | 2 | 7 |
| NHBA | 4 | 2 | 6 |
| AA | 2 | 4 | 6 |
| NHAA | 2 | 4 | 6 |
| HIAC | 1 | 5 | 6 |
| HIA | 1 | 5 | 6 |
| NAC | 1 | 1 | 2 |
| NHNAC | 1 | 1 | 2 |
| HBA | 1 | 0 | 1 |
| HBAC | 1 | 0 | 1 |
| HNAC | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Burleigh County population
42.2 mi,
103°
• Morton County
28.2 mi,
176°
• Stark County
66.1 mi,
251°
• McLean County
37.2 mi,
353°
• Mercer County
26.9 mi,
299°
• Sioux County
70.8 mi,
169°
• Dunn County
62.3 mi,
285°
• Hettinger County
71 mi,
228°
• Grant County
54.5 mi,
195°
• Sheridan County
56.7 mi,
55°
[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
*Williams (old) North Dakota Notes
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