Last official estimated population of Tripp County was 5,639 (year 2014)[1]. This was 0.002% of total US population and 0.7% of total South Dakota state population. Area of Tripp County is 1,617.6 mi² (=4189.5 km²), in this year population density was 3.49 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Tripp County population in 2026 would be 5,624 [0].
Historical population of Tripp County for period 1910-2014 [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
[1910-1920] +3.7 %/yr
[1920-1930] +0.6 %/yr
[1930-1940] -2.43 %/yr
[1940-1950] -0.83 %/yr
[1950-1960] -0.42 %/yr
[1960-1970] -0.69 %/yr
[1970-1980] -1.16 %/yr
[1980-1990] -0.48 %/yr
[1990-2000] -0.73 %/yr
[2000-2005] -1.19 %/yr
[2005-2010] -1.42 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Tripp County? Visit this page: Settlements in Tripp County, SD
Population of Tripp County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 179 | 162 | 341 |
| 5 to 9 | 166 | 176 | 342 |
| 10 to 14 | 161 | 168 | 329 |
| 15 to 19 | 168 | 185 | 353 |
| 20 to 24 | 184 | 151 | 335 |
| 25 to 29 | 148 | 117 | 265 |
| 30 to 34 | 134 | 119 | 253 |
| 35 to 39 | 122 | 150 | 272 |
| 40 to 44 | 148 | 121 | 269 |
| 45 to 49 | 144 | 173 | 317 |
| 50 to 54 | 237 | 210 | 447 |
| 55 to 59 | 215 | 201 | 416 |
| 60 to 64 | 205 | 179 | 384 |
| 65 to 69 | 139 | 165 | 304 |
| 70 to 74 | 122 | 131 | 253 |
| 75 to 79 | 99 | 119 | 218 |
| 80 to 84 | 71 | 98 | 169 |
| 85+ | 84 | 161 | 245 |
Tripp 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 | 2690 | 2730 | 5,420 |
| WAC | 2314 | 2368 | 4,682 |
| NHWAC | 2298 | 2333 | 4,631 |
| WA | 2245 | 2308 | 4,553 |
| NHWA | 2232 | 2277 | 4,509 |
| IAC | 441 | 435 | 876 |
| NHIAC | 423 | 412 | 835 |
| IA | 384 | 390 | 774 |
| NHIA | 368 | 369 | 737 |
| TOM | 73 | 61 | 134 |
| NHTOM | 69 | 57 | 126 |
| H | 36 | 56 | 92 |
| HWAC | 16 | 35 | 51 |
| AAC | 21 | 23 | 44 |
| HWA | 13 | 31 | 44 |
| BAC | 22 | 19 | 41 |
| HIAC | 18 | 23 | 41 |
| NHAAC | 18 | 23 | 41 |
| HIA | 16 | 21 | 37 |
| NHBAC | 17 | 18 | 35 |
| NHAA | 12 | 16 | 28 |
| AA | 12 | 16 | 28 |
| BA | 12 | 10 | 22 |
| NHBA | 9 | 10 | 19 |
| HTOM | 4 | 4 | 8 |
| NAC | 4 | 3 | 7 |
| HBAC | 5 | 1 | 6 |
| NHNAC | 4 | 2 | 6 |
| HAAC | 3 | 0 | 3 |
| HBA | 3 | 0 | 3 |
| HNAC | 0 | 1 | 1 |
| NHNA | 0 | 1 | 1 |
| NA | 0 | 1 | 1 |
| HNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Todd County population
42.9 mi, 
256°
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65.2 mi, 
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• Brule County
47.2 mi, 
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35.9 mi, 
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• Lyman County
37.7 mi, 
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• Boyd County
63.9 mi, 
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• Mellette County
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• Buffalo County
58.6 mi, 
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• Jones County
58.1 mi, 
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• Keya Paha County
33.7 mi, 
166°
[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
*Rosebud Reservation South Dakota Notes
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