Last official estimated population of Montgomery County was 50,288 (year 2014)[1]. This was 0.016% of total US population and 0.3% of total New York state population. Area of Montgomery County is 410.3 mi² (=1062.7 km²), in this year population density was 122.56 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Montgomery County population in 2024 would be 50,461 [0].
Historical population of Montgomery County for period 1790-2014 [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
[1790-1800] -2.65 %/yr
[1800-1810] +6.45 %/yr
[1810-1820] -0.92 %/yr
[1820-1830] +1.53 %/yr
[1830-1840] -1.97 %/yr
[1840-1850] -1.12 %/yr
[1850-1860] -0.36 %/yr
[1860-1870] +1.11 %/yr
[1870-1880] +1.07 %/yr
[1880-1890] +1.78 %/yr
[1890-1900] +0.38 %/yr
[1900-1910] +1.94 %/yr
[1910-1920] +0.06 %/yr
[1920-1930] +0.36 %/yr
[1930-1940] -0.16 %/yr
[1940-1950] +0.08 %/yr
[1950-1960] -0.4 %/yr
[1960-1970] -0.24 %/yr
[1970-1980] -0.45 %/yr
[1980-1990] -0.28 %/yr
[1990-2000] -0.46 %/yr
[2000-2005] -0.05 %/yr
[2005-2010] +0.29 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Montgomery County? Visit this page: Settlements in Montgomery County, NY
Population of Montgomery County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1533 | 1381 | 2,914 |
| 5 to 9 | 1628 | 1483 | 3,111 |
| 10 to 14 | 1664 | 1528 | 3,192 |
| 15 to 19 | 1606 | 1512 | 3,118 |
| 20 to 24 | 1535 | 1504 | 3,039 |
| 25 to 29 | 1537 | 1478 | 3,015 |
| 30 to 34 | 1469 | 1540 | 3,009 |
| 35 to 39 | 1362 | 1376 | 2,738 |
| 40 to 44 | 1508 | 1563 | 3,071 |
| 45 to 49 | 1585 | 1624 | 3,209 |
| 50 to 54 | 1719 | 1811 | 3,530 |
| 55 to 59 | 1823 | 1855 | 3,678 |
| 60 to 64 | 1720 | 1646 | 3,366 |
| 65 to 69 | 1330 | 1415 | 2,745 |
| 70 to 74 | 920 | 985 | 1,905 |
| 75 to 79 | 581 | 789 | 1,370 |
| 80 to 84 | 484 | 711 | 1,195 |
| 85+ | 541 | 1033 | 1,574 |
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 | 23442 | 24196 | 47,638 |
| WA | 23002 | 23759 | 46,761 |
| NH | 21308 | 22204 | 43,512 |
| NHWAC | 20582 | 21477 | 42,059 |
| NHWA | 20262 | 21164 | 41,426 |
| H | 3237 | 3030 | 6,267 |
| HWAC | 2860 | 2719 | 5,579 |
| HWA | 2740 | 2595 | 5,335 |
| BAC | 1010 | 929 | 1,939 |
| BA | 722 | 639 | 1,361 |
| NHBAC | 666 | 637 | 1,303 |
| TOM | 471 | 468 | 939 |
| NHBA | 463 | 428 | 891 |
| NHTOM | 343 | 342 | 685 |
| HBAC | 344 | 292 | 636 |
| AAC | 251 | 294 | 545 |
| IAC | 251 | 236 | 487 |
| NHAAC | 224 | 259 | 483 |
| HBA | 259 | 211 | 470 |
| AA | 178 | 230 | 408 |
| NHAA | 163 | 204 | 367 |
| NHIAC | 148 | 147 | 295 |
| HTOM | 128 | 126 | 254 |
| IA | 128 | 113 | 241 |
| HIAC | 103 | 89 | 192 |
| NHIA | 62 | 59 | 121 |
| HIA | 66 | 54 | 120 |
| NAC | 67 | 49 | 116 |
| NA | 44 | 25 | 69 |
| NHNAC | 36 | 28 | 64 |
| HAAC | 27 | 35 | 62 |
| HNAC | 31 | 21 | 52 |
| HNA | 29 | 18 | 47 |
| HAA | 15 | 26 | 41 |
| NHNA | 15 | 7 | 22 |
• Albany County population
31.9 mi, 
132°
• Saratoga County
32.6 mi, 
64°
• Rensselaer County
48.5 mi, 
105°
• Schenectady County
20.7 mi, 106°
• Herkimer County
50.6 mi, 
336°
• Otsego County
35.5 mi, 
238°
• Fulton County
14.8 mi, 
2°
• Greene County
44.8 mi, 
161°
• Schoharie County
21.4 mi, 
180°
• Hamilton County
52.4 mi, 
356°
[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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