Last official estimated population of Gregory County was 4,258 (year 2014)[1]. This was 0.001% of total US population and 0.5% of total South Dakota state population. Area of Gregory County is 1,053.5 mi² (=2728.6 km²), in this year population density was 4.04 p/mi². If population growth rate would be same as in period 2010-2014 (-0.08%/yr), Gregory County population in 2024 would be 4,226 [0].
Historical population of Gregory 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] +22.31 %/yr
[1900-1910] +19.44 %/yr
[1910-1920] -0.28 %/yr
[1920-1930] -1.06 %/yr
[1930-1940] -1.77 %/yr
[1940-1950] -1.1 %/yr
[1950-1960] -1.44 %/yr
[1960-1970] -0.97 %/yr
[1970-1980] -1.09 %/yr
[1980-1990] -1.15 %/yr
[1990-2000] -1.12 %/yr
[2000-2005] -1.78 %/yr
[2005-2010] -0.49 %/yr
[2010-2014] -0.08 %/yr
Looking for settlements in Gregory County? Visit this page: Settlements in Gregory County, SD
Population of Gregory County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 108 | 132 | 240 |
| 5 to 9 | 138 | 128 | 266 |
| 10 to 14 | 161 | 125 | 286 |
| 15 to 19 | 141 | 114 | 255 |
| 20 to 24 | 112 | 79 | 191 |
| 25 to 29 | 74 | 78 | 152 |
| 30 to 34 | 116 | 93 | 209 |
| 35 to 39 | 111 | 98 | 209 |
| 40 to 44 | 115 | 105 | 220 |
| 45 to 49 | 116 | 101 | 217 |
| 50 to 54 | 153 | 143 | 296 |
| 55 to 59 | 168 | 168 | 336 |
| 60 to 64 | 171 | 151 | 322 |
| 65 to 69 | 142 | 133 | 275 |
| 70 to 74 | 103 | 110 | 213 |
| 75 to 79 | 72 | 106 | 178 |
| 80 to 84 | 65 | 91 | 156 |
| 85+ | 69 | 127 | 196 |
Gregory 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 | 2093 | 2067 | 4,160 |
| WAC | 1944 | 1898 | 3,842 |
| NHWAC | 1916 | 1887 | 3,803 |
| WA | 1902 | 1844 | 3,746 |
| NHWA | 1875 | 1837 | 3,712 |
| IAC | 205 | 190 | 395 |
| NHIAC | 194 | 185 | 379 |
| IA | 170 | 152 | 322 |
| NHIA | 160 | 149 | 309 |
| TOM | 46 | 55 | 101 |
| NHTOM | 45 | 51 | 96 |
| H | 42 | 15 | 57 |
| HWAC | 28 | 11 | 39 |
| BAC | 19 | 19 | 38 |
| NHBAC | 18 | 19 | 37 |
| HWA | 27 | 7 | 34 |
| AAC | 6 | 21 | 27 |
| NHAAC | 6 | 19 | 25 |
| NAC | 8 | 10 | 18 |
| NHAA | 3 | 15 | 18 |
| AA | 3 | 15 | 18 |
| HIAC | 11 | 5 | 16 |
| BA | 8 | 8 | 16 |
| NHBA | 7 | 8 | 15 |
| NA | 6 | 8 | 14 |
| NHNAC | 5 | 9 | 14 |
| HIA | 10 | 3 | 13 |
| NHNA | 3 | 7 | 10 |
| HTOM | 1 | 4 | 5 |
| HNAC | 3 | 1 | 4 |
| HNA | 3 | 1 | 4 |
| HAAC | 0 | 2 | 2 |
| HBA | 1 | 0 | 1 |
| HBAC | 1 | 0 | 1 |
| HAA | 0 | 0 | 0 |
• Holt County population
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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
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