Last official estimated population of Rock County was 1,524 (year 2014)[1]. This was 0% of total US population and 0.1% of total Nebraska state population. Area of Rock County is 1,011.7 mi² (=2620.3 km²), in this year population density was 1.51 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Rock County population in 2026 would be 1,518 [0].
Historical population of Rock 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] -0.93 %/yr
[1900-1910] +2.59 %/yr
[1910-1920] +0.21 %/yr
[1920-1930] -0.95 %/yr
[1930-1940] +1.68 %/yr
[1940-1950] -2.7 %/yr
[1950-1960] -1.68 %/yr
[1960-1970] -1.34 %/yr
[1970-1980] +0.66 %/yr
[1980-1990] -1.64 %/yr
[1990-2000] -1.4 %/yr
[2000-2005] -2.35 %/yr
[2005-2010] -0.4 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Rock County? Visit this page: Settlements in Rock County, NE
Population of Rock County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 41 | 28 | 69 |
| 5 to 9 | 49 | 42 | 91 |
| 10 to 14 | 47 | 40 | 87 |
| 15 to 19 | 45 | 34 | 79 |
| 20 to 24 | 25 | 30 | 55 |
| 25 to 29 | 37 | 39 | 76 |
| 30 to 34 | 42 | 32 | 74 |
| 35 to 39 | 36 | 44 | 80 |
| 40 to 44 | 28 | 28 | 56 |
| 45 to 49 | 26 | 28 | 54 |
| 50 to 54 | 53 | 61 | 114 |
| 55 to 59 | 85 | 68 | 153 |
| 60 to 64 | 67 | 73 | 140 |
| 65 to 69 | 48 | 48 | 96 |
| 70 to 74 | 32 | 25 | 57 |
| 75 to 79 | 19 | 27 | 46 |
| 80 to 84 | 22 | 25 | 47 |
| 85+ | 23 | 46 | 69 |
Rock 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 | 711 | 711 | 1,422 |
| WA | 709 | 707 | 1,416 |
| NH | 708 | 704 | 1,412 |
| NHWAC | 697 | 698 | 1,395 |
| NHWA | 695 | 694 | 1,389 |
| H | 17 | 14 | 31 |
| HWA | 14 | 13 | 27 |
| HWAC | 14 | 13 | 27 |
| IAC | 9 | 7 | 16 |
| IA | 9 | 4 | 13 |
| NHIAC | 6 | 7 | 13 |
| NHIA | 6 | 4 | 10 |
| AAC | 5 | 4 | 9 |
| NHAAC | 5 | 3 | 8 |
| AA | 4 | 3 | 7 |
| NHAA | 4 | 2 | 6 |
| NHTOM | 2 | 4 | 6 |
| TOM | 2 | 4 | 6 |
| HIA | 3 | 0 | 3 |
| HIAC | 3 | 0 | 3 |
| BAC | 2 | 1 | 3 |
| NHBAC | 2 | 1 | 3 |
| BA | 1 | 0 | 1 |
| NHBA | 1 | 0 | 1 |
| HAAC | 0 | 1 | 1 |
| HAA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| NHNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HBAC | 0 | 0 | 0 |
| NAC | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
• Holt County population
32.7 mi, 
82°
• Valley County
61.6 mi, 
158°
• Gregory County
55.3 mi, 
11°
• Brown County
25.8 mi, 
264°
• Boyd County
47.7 mi, 
43°
• Garfield County
41.4 mi, 
144°
• Wheeler County
56.5 mi, 
125°
• Keya Paha County
36.5 mi, 
335°
• Loup County
34.6 mi, 
187°
• Blaine County
43.6 mi, 
221°
[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
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