Last official estimated population of Montgomery County was 10,694 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Iowa state population. Area of Montgomery County is 425.0 mi² (=1100.8 km²), in this year population density was 25.16 p/mi². If population growth rate would be same as in period 2010-2014 (-0.11%/yr), Montgomery County population in 2025 would be 10,569 [0].
Historical population of Montgomery County for period 1860-2014 [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
[1860-1870] +16.8 %/yr
[1870-1880] +10.35 %/yr
[1880-1890] -0.03 %/yr
[1890-1900] +1.17 %/yr
[1900-1910] -0.69 %/yr
[1910-1920] +0.26 %/yr
[1920-1930] -0.17 %/yr
[1930-1940] -0.65 %/yr
[1940-1950] -0.01 %/yr
[1950-1960] -0.81 %/yr
[1960-1970] -1.23 %/yr
[1970-1980] +0.48 %/yr
[1980-1990] -1.04 %/yr
[1990-2000] -0.25 %/yr
[2000-2005] -0.97 %/yr
[2005-2010] -0.86 %/yr
[2010-2014] -0.11 %/yr
Looking for settlements in Montgomery County? Visit this page: Settlements in Montgomery County, IA
Population of Montgomery County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 305 | 288 | 593 |
| 5 to 9 | 348 | 302 | 650 |
| 10 to 14 | 345 | 327 | 672 |
| 15 to 19 | 337 | 347 | 684 |
| 20 to 24 | 250 | 274 | 524 |
| 25 to 29 | 233 | 213 | 446 |
| 30 to 34 | 262 | 249 | 511 |
| 35 to 39 | 273 | 261 | 534 |
| 40 to 44 | 307 | 312 | 619 |
| 45 to 49 | 301 | 329 | 630 |
| 50 to 54 | 385 | 405 | 790 |
| 55 to 59 | 421 | 424 | 845 |
| 60 to 64 | 395 | 360 | 755 |
| 65 to 69 | 307 | 294 | 601 |
| 70 to 74 | 217 | 262 | 479 |
| 75 to 79 | 145 | 197 | 342 |
| 80 to 84 | 147 | 205 | 352 |
| 85+ | 123 | 271 | 394 |
Montgomery 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 | 5029 | 5260 | 10,289 |
| WA | 4976 | 5209 | 10,185 |
| NH | 4899 | 5162 | 10,061 |
| NHWAC | 4835 | 5107 | 9,942 |
| NHWA | 4786 | 5060 | 9,846 |
| H | 202 | 158 | 360 |
| HWAC | 194 | 153 | 347 |
| HWA | 190 | 149 | 339 |
| TOM | 53 | 53 | 106 |
| NHTOM | 49 | 49 | 98 |
| IAC | 48 | 45 | 93 |
| NHIAC | 41 | 39 | 80 |
| BAC | 44 | 31 | 75 |
| NHBAC | 43 | 30 | 73 |
| AAC | 29 | 29 | 58 |
| NHAAC | 25 | 27 | 52 |
| IA | 28 | 19 | 47 |
| BA | 24 | 17 | 41 |
| NHBA | 24 | 16 | 40 |
| NHIA | 24 | 16 | 40 |
| AA | 18 | 19 | 37 |
| NHAA | 14 | 18 | 32 |
| HIAC | 7 | 6 | 13 |
| NAC | 4 | 8 | 12 |
| NHNAC | 4 | 8 | 12 |
| HTOM | 4 | 4 | 8 |
| HIA | 4 | 3 | 7 |
| HAAC | 4 | 2 | 6 |
| HAA | 4 | 1 | 5 |
| NA | 2 | 3 | 5 |
| NHNA | 2 | 3 | 5 |
| HBAC | 1 | 1 | 2 |
| HBA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Pottawattamie County population
29.8 mi, 
317°
• Page County
19.5 mi, 
177°
• Mills County
24.1 mi, 
271°
• Cass County
24.5 mi, 
28°
• Shelby County
46.1 mi, 
350°
• Adair County
41.2 mi, 
59°
• Fremont County
30.1 mi, 
230°
• Taylor County
31 mi, 
129°
• Atchison County
43.3 mi, 
199°
• Adams County
24 mi, 
90°
[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
*Pottawattamie Iowa Notes
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