Last official estimated population of Dawson County was 8,930 (year 2014)[1]. This was 0.003% of total US population and 0.9% of total Montana state population. Area of Dawson County is 2,383.5 mi² (=6173.2 km²), in this year population density was 3.75 p/mi². If population growth rate would be same as in period 2010-2014 (-0.1%/yr), Dawson County population in 2024 would be 8,841 [0].
Historical population of Dawson County for period 1870-2014 [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
[1870-1880] +0.17 %/yr
[1880-1890] +27.58 %/yr
[1890-1900] +1.74 %/yr
[1900-1910] +17.94 %/yr
[1910-1920] -3.15 %/yr
[1920-1930] +0.67 %/yr
[1930-1940] -1.36 %/yr
[1940-1950] +0.54 %/yr
[1950-1960] +3.08 %/yr
[1960-1970] -0.88 %/yr
[1970-1980] +0.47 %/yr
[1980-1990] -2.14 %/yr
[1990-2000] -0.48 %/yr
[2000-2005] -0.58 %/yr
[2005-2010] +0.37 %/yr
[2010-2014] -0.1 %/yr
Looking for settlements in Dawson County? Visit this page: Settlements in Dawson County, MT
Population of Dawson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 316 | 300 | 616 |
| 5 to 9 | 311 | 285 | 596 |
| 10 to 14 | 316 | 283 | 599 |
| 15 to 19 | 291 | 266 | 557 |
| 20 to 24 | 346 | 300 | 646 |
| 25 to 29 | 370 | 272 | 642 |
| 30 to 34 | 328 | 276 | 604 |
| 35 to 39 | 270 | 242 | 512 |
| 40 to 44 | 305 | 231 | 536 |
| 45 to 49 | 272 | 250 | 522 |
| 50 to 54 | 330 | 351 | 681 |
| 55 to 59 | 368 | 366 | 734 |
| 60 to 64 | 346 | 329 | 675 |
| 65 to 69 | 250 | 227 | 477 |
| 70 to 74 | 168 | 169 | 337 |
| 75 to 79 | 112 | 157 | 269 |
| 80 to 84 | 100 | 148 | 248 |
| 85+ | 98 | 169 | 267 |
Dawson 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 | 4768 | 4493 | 9,261 |
| WAC | 4721 | 4495 | 9,216 |
| WA | 4620 | 4409 | 9,029 |
| NHWAC | 4608 | 4384 | 8,992 |
| NHWA | 4515 | 4313 | 8,828 |
| IAC | 186 | 143 | 329 |
| NHIAC | 172 | 118 | 290 |
| H | 129 | 128 | 257 |
| HWAC | 113 | 111 | 224 |
| IA | 116 | 88 | 204 |
| HWA | 105 | 96 | 201 |
| TOM | 104 | 87 | 191 |
| NHIA | 110 | 72 | 182 |
| NHTOM | 95 | 72 | 167 |
| BAC | 64 | 29 | 93 |
| NHBAC | 57 | 25 | 82 |
| AAC | 24 | 40 | 64 |
| NHAAC | 24 | 36 | 60 |
| BA | 39 | 7 | 46 |
| NHBA | 35 | 7 | 42 |
| HIAC | 14 | 25 | 39 |
| AA | 10 | 29 | 39 |
| NHAA | 10 | 28 | 38 |
| HTOM | 9 | 15 | 24 |
| HIA | 6 | 16 | 22 |
| NAC | 9 | 2 | 11 |
| HBAC | 7 | 4 | 11 |
| NA | 8 | 1 | 9 |
| HNAC | 6 | 0 | 6 |
| HNA | 5 | 0 | 5 |
| NHNAC | 3 | 2 | 5 |
| HBA | 4 | 0 | 4 |
| NHNA | 3 | 1 | 4 |
| HAAC | 0 | 4 | 4 |
| HAA | 0 | 1 | 1 |
• Custer County population
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77.1 mi, 
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• Fallon County
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• McCone County
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• Golden Valley County
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• Prairie County
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• Wibaux County
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• Billings County
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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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