Last official estimated population of Madison County was 7,683 (year 2014)[1]. This was 0.002% of total US population and 0.7% of total Montana state population. Area of Madison County is 3,603.5 mi² (=9333.1 km²), in this year population density was 2.13 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Madison County population in 2025 would be 7,661 [0].
Historical population of Madison 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] +3.85 %/yr
[1880-1890] +1.83 %/yr
[1890-1900] +5.07 %/yr
[1900-1910] -0.62 %/yr
[1910-1920] +0.36 %/yr
[1920-1930] -1.69 %/yr
[1930-1940] +1.44 %/yr
[1940-1950] -1.94 %/yr
[1950-1960] -1.4 %/yr
[1960-1970] -0.38 %/yr
[1970-1980] +0.83 %/yr
[1980-1990] +0.95 %/yr
[1990-2000] +1.35 %/yr
[2000-2005] +1.04 %/yr
[2005-2010] +1.3 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Madison County? Visit this page: Settlements in Madison County, MT
Population of Madison County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 180 | 118 | 298 |
| 5 to 9 | 177 | 145 | 322 |
| 10 to 14 | 178 | 197 | 375 |
| 15 to 19 | 187 | 179 | 366 |
| 20 to 24 | 199 | 157 | 356 |
| 25 to 29 | 176 | 140 | 316 |
| 30 to 34 | 196 | 192 | 388 |
| 35 to 39 | 197 | 172 | 369 |
| 40 to 44 | 217 | 176 | 393 |
| 45 to 49 | 204 | 214 | 418 |
| 50 to 54 | 306 | 285 | 591 |
| 55 to 59 | 336 | 366 | 702 |
| 60 to 64 | 435 | 432 | 867 |
| 65 to 69 | 432 | 326 | 758 |
| 70 to 74 | 306 | 231 | 537 |
| 75 to 79 | 181 | 157 | 338 |
| 80 to 84 | 104 | 116 | 220 |
| 85+ | 91 | 115 | 206 |
Madison 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 |
| WAC | 4038 | 3661 | 7,699 |
| NH | 3983 | 3612 | 7,595 |
| WA | 3986 | 3582 | 7,568 |
| NHWAC | 3926 | 3557 | 7,483 |
| NHWA | 3884 | 3492 | 7,376 |
| H | 119 | 106 | 225 |
| HWAC | 112 | 104 | 216 |
| HWA | 102 | 90 | 192 |
| IAC | 74 | 79 | 153 |
| TOM | 55 | 79 | 134 |
| NHIAC | 61 | 70 | 131 |
| NHTOM | 45 | 65 | 110 |
| BAC | 30 | 26 | 56 |
| NHBAC | 28 | 25 | 53 |
| IA | 28 | 22 | 50 |
| AAC | 15 | 33 | 48 |
| NHIA | 22 | 20 | 42 |
| NHAAC | 14 | 27 | 41 |
| NHBA | 21 | 16 | 37 |
| BA | 21 | 16 | 37 |
| AA | 11 | 19 | 30 |
| NHAA | 11 | 19 | 30 |
| HTOM | 10 | 14 | 24 |
| HIAC | 13 | 9 | 22 |
| HIA | 6 | 2 | 8 |
| HAAC | 1 | 6 | 7 |
| NAC | 2 | 1 | 3 |
| HBAC | 2 | 1 | 3 |
| NHNAC | 1 | 1 | 2 |
| HNAC | 1 | 0 | 1 |
| NA | 1 | 0 | 1 |
| HNA | 1 | 0 | 1 |
| HBA | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Gallatin County population
38.7 mi, 
69°
• Silver Bow County
53.4 mi, 
317°
• Park County
67.4 mi, 
84°
• Fremont County
79.3 mi, 
164°
• Jefferson County
55.6 mi, 
352°
• Deer Lodge County
79.6 mi, 
311°
• Beaverhead County
49.4 mi, 
254°
• Broadwater County
72.2 mi, 
16°
• Meagher County
99.3 mi, 
28°
• Clark County
74.7 mi, 
196°
[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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