Last official estimated population of Valley County was 7,367 (year 2014)[1]. This was 0.002% of total US population and 0.7% of total Montana state population. Area of Valley County is 5,061.9 mi² (=13110.3 km²), in this year population density was 1.46 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Valley County population in 2024 would be 7,362 [0].
Historical population of Valley County for period 1900-2014 [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
[1900-1910] +12.09 %/yr
[1910-1920] -1.65 %/yr
[1920-1930] -0.32 %/yr
[1930-1940] +3.11 %/yr
[1940-1950] -2.86 %/yr
[1950-1960] +4.17 %/yr
[1960-1970] -3.9 %/yr
[1970-1980] -1.12 %/yr
[1980-1990] -2.16 %/yr
[1990-2000] -0.71 %/yr
[2000-2005] -0.81 %/yr
[2005-2010] +0.01 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Valley County? Visit this page: Settlements in Valley County, MT
Population of Valley County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 218 | 191 | 409 |
| 5 to 9 | 250 | 243 | 493 |
| 10 to 14 | 281 | 234 | 515 |
| 15 to 19 | 230 | 230 | 460 |
| 20 to 24 | 195 | 206 | 401 |
| 25 to 29 | 188 | 159 | 347 |
| 30 to 34 | 210 | 212 | 422 |
| 35 to 39 | 222 | 177 | 399 |
| 40 to 44 | 184 | 192 | 376 |
| 45 to 49 | 223 | 211 | 434 |
| 50 to 54 | 273 | 311 | 584 |
| 55 to 59 | 330 | 285 | 615 |
| 60 to 64 | 312 | 285 | 597 |
| 65 to 69 | 210 | 222 | 432 |
| 70 to 74 | 187 | 170 | 357 |
| 75 to 79 | 144 | 181 | 325 |
| 80 to 84 | 111 | 131 | 242 |
| 85+ | 89 | 143 | 232 |
Valley 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 | 3772 | 3700 | 7,472 |
| WAC | 3432 | 3391 | 6,823 |
| NHWAC | 3358 | 3322 | 6,680 |
| WA | 3341 | 3311 | 6,652 |
| NHWA | 3275 | 3248 | 6,523 |
| IAC | 439 | 401 | 840 |
| NHIAC | 423 | 386 | 809 |
| IA | 371 | 345 | 716 |
| NHIA | 363 | 332 | 695 |
| TOM | 94 | 86 | 180 |
| H | 85 | 83 | 168 |
| NHTOM | 85 | 79 | 164 |
| HWAC | 74 | 69 | 143 |
| HWA | 66 | 63 | 129 |
| AAC | 34 | 45 | 79 |
| NHAAC | 33 | 45 | 78 |
| BAC | 42 | 28 | 70 |
| NHBAC | 38 | 24 | 62 |
| AA | 21 | 32 | 53 |
| NHAA | 20 | 32 | 52 |
| BA | 24 | 9 | 33 |
| NHBA | 23 | 9 | 32 |
| HIAC | 16 | 15 | 31 |
| HIA | 8 | 13 | 21 |
| HTOM | 9 | 7 | 16 |
| NAC | 10 | 5 | 15 |
| NHNAC | 10 | 3 | 13 |
| HBAC | 4 | 4 | 8 |
| NHNA | 6 | 0 | 6 |
| NA | 6 | 0 | 6 |
| HNAC | 0 | 2 | 2 |
| HAAC | 1 | 0 | 1 |
| HBA | 1 | 0 | 1 |
| HAA | 1 | 0 | 1 |
| HNA | 0 | 0 | 0 |
• Roosevelt County population
77.1 mi, 
93°
• Richland County
104.8 mi, 
111°
• Dawson County
110.8 mi, 
132°
• Blaine County
105.5 mi, 
272°
• Phillips County
58.2 mi, 
263°
• Sheridan County
100.8 mi, 
75°
• Daniels County
60 mi, 
59°
• McCone County
65.3 mi, 
139°
• Garfield County
75.4 mi, 
191°
• Petroleum County
110.4 mi, 
220°
[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
*Dawson Montana Notes
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