Last official estimated population of Calhoun County was 5,079 (year 2014)[1]. This was 0.002% of total US population and 0% of total Illinois state population. Area of Calhoun County is 283.6 mi² (=734.5 km²), in this year population density was 17.91 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Calhoun County population in 2024 would be 5,054 [0].
Historical population of Calhoun 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] +4.79 %/yr
[1840-1850] +6.38 %/yr
[1850-1860] +4.76 %/yr
[1860-1870] +2.46 %/yr
[1870-1880] +1.3 %/yr
[1880-1890] +0.25 %/yr
[1890-1900] +1.54 %/yr
[1900-1910] -0.35 %/yr
[1910-1920] -0.43 %/yr
[1920-1930] -0.26 %/yr
[1930-1940] +0.21 %/yr
[1940-1950] -1.72 %/yr
[1950-1960] -1.5 %/yr
[1960-1970] -0.44 %/yr
[1970-1980] +0.33 %/yr
[1980-1990] -0.97 %/yr
[1990-2000] -0.47 %/yr
[2000-2005] +0.33 %/yr
[2005-2010] -0.29 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Calhoun County? Visit this page: Settlements in Calhoun County, IL
Population of Calhoun County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 125 | 133 | 258 |
| 5 to 9 | 148 | 124 | 272 |
| 10 to 14 | 150 | 136 | 286 |
| 15 to 19 | 142 | 150 | 292 |
| 20 to 24 | 137 | 117 | 254 |
| 25 to 29 | 132 | 104 | 236 |
| 30 to 34 | 118 | 120 | 238 |
| 35 to 39 | 131 | 125 | 256 |
| 40 to 44 | 142 | 141 | 283 |
| 45 to 49 | 170 | 180 | 350 |
| 50 to 54 | 199 | 179 | 378 |
| 55 to 59 | 211 | 175 | 386 |
| 60 to 64 | 173 | 163 | 336 |
| 65 to 69 | 137 | 181 | 318 |
| 70 to 74 | 146 | 152 | 298 |
| 75 to 79 | 98 | 114 | 212 |
| 80 to 84 | 65 | 84 | 149 |
| 85+ | 59 | 95 | 154 |
Calhoun 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 | 2466 | 2451 | 4,917 |
| NH | 2451 | 2449 | 4,900 |
| WA | 2456 | 2440 | 4,896 |
| NHWAC | 2435 | 2427 | 4,862 |
| NHWA | 2425 | 2416 | 4,841 |
| H | 32 | 24 | 56 |
| HWA | 31 | 24 | 55 |
| HWAC | 31 | 24 | 55 |
| BAC | 18 | 11 | 29 |
| NHBAC | 17 | 11 | 28 |
| TOM | 10 | 12 | 22 |
| NHTOM | 10 | 12 | 22 |
| NHIAC | 7 | 10 | 17 |
| IAC | 7 | 10 | 17 |
| BA | 11 | 4 | 15 |
| AA | 3 | 12 | 15 |
| AAC | 3 | 12 | 15 |
| NHAA | 3 | 12 | 15 |
| NHAAC | 3 | 12 | 15 |
| NHBA | 10 | 4 | 14 |
| IA | 3 | 5 | 8 |
| NHIA | 3 | 5 | 8 |
| HBAC | 1 | 0 | 1 |
| HBA | 1 | 0 | 1 |
| NAC | 0 | 1 | 1 |
| NHNAC | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| HIA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HIAC | 0 | 0 | 0 |
• St. Louis County population
38.1 mi, 
161°
• St. Charles County
26.5 mi, 
181°
• Lincoln County
17.4 mi, 
246°
• Macoupin County
40.2 mi, 
79°
• Warren County
38.4 mi, 
223°
• Jersey County
17.3 mi, 
109°
• Pike County
29.6 mi, 
294°
• Pike County
34 mi, 
339°
• Greene County
19.9 mi, 
48°
• Scott County
34.2 mi, 
17°
[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
*Madison Illinois Notes
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