Last official estimated population of Menard County was 12,693 (year 2014)[1]. This was 0.004% of total US population and 0.1% of total Illinois state population. Area of Menard County is 315.5 mi² (=817 km²), in this year population density was 40.24 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Menard County population in 2026 would be 12,657 [0].
Historical population of Menard County for period 1840-2014 [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

[1840-1850] +3.66 %/yr
[1850-1860] +4.2 %/yr
[1860-1870] +2.05 %/yr
[1870-1880] +1.05 %/yr
[1880-1890] +0.07 %/yr
[1890-1900] +0.89 %/yr
[1900-1910] -1.13 %/yr
[1910-1920] -0.9 %/yr
[1920-1930] -1 %/yr
[1930-1940] +0.08 %/yr
[1940-1950] -1 %/yr
[1950-1960] -0.41 %/yr
[1960-1970] +0.46 %/yr
[1970-1980] +1.91 %/yr
[1980-1990] -0.47 %/yr
[1990-2000] +1.12 %/yr
[2000-2005] +0.12 %/yr
[2005-2010] +0.24 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Menard County? Visit this page: Settlements in Menard County, IL
Population of Menard County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 344 | 327 | 671 |
| 5 to 9 | 394 | 402 | 796 |
| 10 to 14 | 410 | 420 | 830 |
| 15 to 19 | 432 | 373 | 805 |
| 20 to 24 | 357 | 326 | 683 |
| 25 to 29 | 292 | 312 | 604 |
| 30 to 34 | 316 | 385 | 701 |
| 35 to 39 | 387 | 343 | 730 |
| 40 to 44 | 356 | 363 | 719 |
| 45 to 49 | 412 | 452 | 864 |
| 50 to 54 | 489 | 520 | 1,009 |
| 55 to 59 | 526 | 487 | 1,013 |
| 60 to 64 | 395 | 474 | 869 |
| 65 to 69 | 384 | 401 | 785 |
| 70 to 74 | 244 | 266 | 510 |
| 75 to 79 | 181 | 230 | 411 |
| 80 to 84 | 107 | 146 | 253 |
| 85+ | 93 | 224 | 317 |
Menard 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 | 6041 | 6359 | 12,400 |
| WAC | 6006 | 6332 | 12,338 |
| WA | 5931 | 6264 | 12,195 |
| NHWAC | 5937 | 6243 | 12,180 |
| NHWA | 5869 | 6178 | 12,047 |
| BAC | 114 | 100 | 214 |
| NHBAC | 109 | 98 | 207 |
| H | 78 | 92 | 170 |
| HWAC | 69 | 89 | 158 |
| TOM | 76 | 74 | 150 |
| HWA | 62 | 86 | 148 |
| BA | 81 | 65 | 146 |
| NHBA | 78 | 64 | 142 |
| NHTOM | 69 | 71 | 140 |
| IAC | 51 | 46 | 97 |
| NHIAC | 43 | 42 | 85 |
| AAC | 24 | 46 | 70 |
| NHAAC | 22 | 45 | 67 |
| AA | 11 | 32 | 43 |
| NHAA | 10 | 32 | 42 |
| IA | 19 | 14 | 33 |
| NHIA | 15 | 12 | 27 |
| HIAC | 8 | 4 | 12 |
| HTOM | 7 | 3 | 10 |
| NAC | 3 | 7 | 10 |
| HBAC | 5 | 2 | 7 |
| NHNAC | 1 | 6 | 7 |
| HIA | 4 | 2 | 6 |
| HBA | 3 | 1 | 4 |
| HNAC | 2 | 1 | 3 |
| HAAC | 2 | 1 | 3 |
| NA | 1 | 2 | 3 |
| NHNA | 0 | 2 | 2 |
| HNA | 1 | 0 | 1 |
| HAA | 1 | 0 | 1 |
• Sangamon County population
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[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
*Sangamon Illinois Notes
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