Last official estimated population of Missoula County was 109,425 (year 2014)[1]. This was 0.034% of total US population and 10.6% of total Montana state population. Area of Missoula County is 2,617.9 mi² (=6780.5 km²), in this year population density was 41.80 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Missoula County population in 2024 would be 109,741 [0].
Historical population of Missoula 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] -0.07 %/yr
[1880-1890] +18.98 %/yr
[1890-1900] -0.33 %/yr
[1900-1910] +5.39 %/yr
[1910-1920] +0.19 %/yr
[1920-1930] -0.98 %/yr
[1930-1940] +2.92 %/yr
[1940-1950] +2.03 %/yr
[1950-1960] +2.32 %/yr
[1960-1970] +2.69 %/yr
[1970-1980] +2.7 %/yr
[1980-1990] +0.35 %/yr
[1990-2000] +1.99 %/yr
[2000-2005] +1.32 %/yr
[2005-2010] +1.33 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Missoula County? Visit this page: Settlements in Missoula County, MT
Population of Missoula County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3080 | 3014 | 6,094 |
| 5 to 9 | 3343 | 3028 | 6,371 |
| 10 to 14 | 3012 | 2839 | 5,851 |
| 15 to 19 | 3794 | 3704 | 7,498 |
| 20 to 24 | 6942 | 6646 | 13,588 |
| 25 to 29 | 4411 | 4206 | 8,617 |
| 30 to 34 | 4437 | 4047 | 8,484 |
| 35 to 39 | 3679 | 3409 | 7,088 |
| 40 to 44 | 3253 | 2958 | 6,211 |
| 45 to 49 | 2999 | 3038 | 6,037 |
| 50 to 54 | 3433 | 3592 | 7,025 |
| 55 to 59 | 3507 | 3822 | 7,329 |
| 60 to 64 | 3533 | 3595 | 7,128 |
| 65 to 69 | 2877 | 2768 | 5,645 |
| 70 to 74 | 1824 | 1911 | 3,735 |
| 75 to 79 | 1125 | 1205 | 2,330 |
| 80 to 84 | 761 | 998 | 1,759 |
| 85+ | 671 | 1223 | 1,894 |
Missoula 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 | 54883 | 54312 | 109,195 |
| WAC | 53814 | 52966 | 106,780 |
| WA | 52300 | 51530 | 103,830 |
| NHWAC | 52289 | 51532 | 103,821 |
| NHWA | 50890 | 50214 | 101,104 |
| IAC | 2522 | 2550 | 5,072 |
| NHIAC | 2255 | 2290 | 4,545 |
| H | 1798 | 1691 | 3,489 |
| IA | 1588 | 1658 | 3,246 |
| TOM | 1596 | 1499 | 3,095 |
| HWAC | 1525 | 1434 | 2,959 |
| NHIA | 1414 | 1495 | 2,909 |
| NHTOM | 1466 | 1366 | 2,832 |
| HWA | 1410 | 1316 | 2,726 |
| AAC | 1143 | 1431 | 2,574 |
| NHAAC | 1093 | 1355 | 2,448 |
| AA | 684 | 1004 | 1,688 |
| NHAA | 663 | 964 | 1,627 |
| BAC | 771 | 519 | 1,290 |
| NHBAC | 671 | 459 | 1,130 |
| BA | 440 | 244 | 684 |
| NHBA | 379 | 209 | 588 |
| HIAC | 267 | 260 | 527 |
| HIA | 174 | 163 | 337 |
| NAC | 170 | 163 | 333 |
| NHNAC | 158 | 145 | 303 |
| HTOM | 130 | 133 | 263 |
| HBAC | 100 | 60 | 160 |
| NA | 73 | 68 | 141 |
| NHNA | 71 | 64 | 135 |
| HAAC | 50 | 76 | 126 |
| HBA | 61 | 35 | 96 |
| HAA | 21 | 40 | 61 |
| HNAC | 12 | 18 | 30 |
| HNA | 2 | 4 | 6 |
• Flathead County population
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355°
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71.3 mi, 
84°
• Ravalli County
66.4 mi, 
189°
• Lake County
43.5 mi, 
348°
• Sanders County
78.5 mi, 
309°
• Deer Lodge County
73.7 mi, 
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• Clearwater County
86.7 mi, 
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• Powell County
47.1 mi, 
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• Mineral County
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• Granite County
48.9 mi, 153°
[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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