Last official estimated population of Montgomery County was 38,096 (year 2014)[1]. This was 0.012% of total US population and 0.6% of total Indiana state population. Area of Montgomery County is 505.4 mi² (=1309.1 km²), in this year population density was 75.37 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Montgomery County population in 2025 would be 38,019 [0].
Historical population of Montgomery County for period 1830-2014 [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
[1830-1840] +7.03 %/yr
[1840-1850] +2.28 %/yr
[1850-1860] +1.45 %/yr
[1860-1870] +1.3 %/yr
[1870-1880] +1.4 %/yr
[1880-1890] +0.26 %/yr
[1890-1900] +0.48 %/yr
[1900-1910] -0.03 %/yr
[1910-1920] -0.28 %/yr
[1920-1930] -0.54 %/yr
[1930-1940] +0.09 %/yr
[1940-1950] +0.67 %/yr
[1950-1960] +0.97 %/yr
[1960-1970] +0.56 %/yr
[1970-1980] +0.45 %/yr
[1980-1990] -0.3 %/yr
[1990-2000] +0.89 %/yr
[2000-2005] +0.25 %/yr
[2005-2010] +0.01 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Montgomery County? Visit this page: Settlements in Montgomery County, IN
Population of Montgomery County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1230 | 1171 | 2,401 |
| 5 to 9 | 1196 | 1237 | 2,433 |
| 10 to 14 | 1295 | 1251 | 2,546 |
| 15 to 19 | 1472 | 1111 | 2,583 |
| 20 to 24 | 1545 | 1099 | 2,644 |
| 25 to 29 | 1103 | 993 | 2,096 |
| 30 to 34 | 1063 | 1027 | 2,090 |
| 35 to 39 | 1098 | 1061 | 2,159 |
| 40 to 44 | 1205 | 1191 | 2,396 |
| 45 to 49 | 1220 | 1239 | 2,459 |
| 50 to 54 | 1443 | 1468 | 2,911 |
| 55 to 59 | 1420 | 1375 | 2,795 |
| 60 to 64 | 1124 | 1163 | 2,287 |
| 65 to 69 | 893 | 1039 | 1,932 |
| 70 to 74 | 727 | 845 | 1,572 |
| 75 to 79 | 548 | 641 | 1,189 |
| 80 to 84 | 345 | 457 | 802 |
| 85+ | 291 | 560 | 851 |
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 | 18736 | 18592 | 37,328 |
| WA | 18499 | 18340 | 36,839 |
| NH | 18316 | 18121 | 36,437 |
| NHWAC | 17896 | 17842 | 35,738 |
| NHWA | 17675 | 17617 | 35,292 |
| H | 902 | 807 | 1,709 |
| HWAC | 840 | 750 | 1,590 |
| HWA | 824 | 723 | 1,547 |
| BAC | 389 | 274 | 663 |
| NHBAC | 359 | 235 | 594 |
| TOM | 252 | 262 | 514 |
| NHTOM | 234 | 232 | 466 |
| BA | 252 | 145 | 397 |
| NHBA | 231 | 119 | 350 |
| IAC | 163 | 166 | 329 |
| AAC | 175 | 150 | 325 |
| NHAAC | 164 | 144 | 308 |
| NHIAC | 127 | 123 | 250 |
| AA | 129 | 109 | 238 |
| NHAA | 122 | 107 | 229 |
| IA | 78 | 65 | 143 |
| NHIA | 50 | 41 | 91 |
| HIAC | 36 | 43 | 79 |
| HBAC | 30 | 39 | 69 |
| HIA | 28 | 24 | 52 |
| HTOM | 18 | 30 | 48 |
| HBA | 21 | 26 | 47 |
| NAC | 16 | 20 | 36 |
| NHNAC | 11 | 14 | 25 |
| HAAC | 11 | 6 | 17 |
| NA | 8 | 7 | 15 |
| HNAC | 5 | 6 | 11 |
| HAA | 7 | 2 | 9 |
| NHNA | 4 | 5 | 9 |
| HNA | 4 | 2 | 6 |
• Tippecanoe County population
24.1 mi, 
359°
• Hendricks County
27.6 mi, 
132°
• Boone County
22.4 mi, 
88°
• Putnam County
26 mi, 
175°
• Clinton County
28.6 mi, 
50°
• Carroll County
41.4 mi, 
24°
• Parke County
24.5 mi, 
221°
• Fountain County
18.9 mi, 
287°
• Vermillion County
32.8 mi, 
246°
• Warren County
33.4 mi, 
310°
[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
*Wabash (old) Indiana Notes
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