Last official estimated population of Logan County was 30,283 (year 2014)[1]. This was 0.009% of total US population and 0.2% of total Illinois state population. Area of Logan County is 618.9 mi² (=1603 km²), in this year population density was 48.93 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Logan County population in 2026 would be 30,217 [0].
Historical population of Logan 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] +8.19 %/yr
[1850-1860] +10.78 %/yr
[1860-1870] +4.91 %/yr
[1870-1880] +0.83 %/yr
[1880-1890] +0.18 %/yr
[1890-1900] +1.19 %/yr
[1900-1910] +0.52 %/yr
[1910-1920] -0.22 %/yr
[1920-1930] -0.24 %/yr
[1930-1940] +0.2 %/yr
[1940-1950] +0.41 %/yr
[1950-1960] +0.93 %/yr
[1960-1970] -0.04 %/yr
[1970-1980] -0.53 %/yr
[1980-1990] -0.32 %/yr
[1990-2000] +0.13 %/yr
[2000-2005] -0.26 %/yr
[2005-2010] -0.32 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Logan County? Visit this page: Settlements in Logan County, IL
Population of Logan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 709 | 699 | 1,408 |
| 5 to 9 | 788 | 791 | 1,579 |
| 10 to 14 | 861 | 799 | 1,660 |
| 15 to 19 | 1045 | 996 | 2,041 |
| 20 to 24 | 1263 | 1006 | 2,269 |
| 25 to 29 | 1159 | 867 | 2,026 |
| 30 to 34 | 1141 | 906 | 2,047 |
| 35 to 39 | 1008 | 898 | 1,906 |
| 40 to 44 | 956 | 896 | 1,852 |
| 45 to 49 | 941 | 897 | 1,838 |
| 50 to 54 | 1090 | 1067 | 2,157 |
| 55 to 59 | 1028 | 1009 | 2,037 |
| 60 to 64 | 892 | 944 | 1,836 |
| 65 to 69 | 690 | 739 | 1,429 |
| 70 to 74 | 534 | 646 | 1,180 |
| 75 to 79 | 389 | 519 | 908 |
| 80 to 84 | 283 | 439 | 722 |
| 85+ | 271 | 580 | 851 |
Logan 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 | 14386 | 14339 | 28,725 |
| WAC | 13305 | 13665 | 26,970 |
| WA | 13116 | 13461 | 26,577 |
| NHWAC | 12741 | 13348 | 26,089 |
| NHWA | 12590 | 13166 | 25,756 |
| BAC | 1667 | 974 | 2,641 |
| NHBAC | 1598 | 934 | 2,532 |
| BA | 1562 | 850 | 2,412 |
| NHBA | 1513 | 822 | 2,335 |
| H | 662 | 359 | 1,021 |
| HWAC | 564 | 317 | 881 |
| HWA | 526 | 295 | 821 |
| TOM | 208 | 216 | 424 |
| NHTOM | 166 | 191 | 357 |
| AAC | 150 | 182 | 332 |
| NHAAC | 129 | 175 | 304 |
| AA | 93 | 131 | 224 |
| IAC | 123 | 92 | 215 |
| NHAA | 85 | 130 | 215 |
| NHIAC | 74 | 70 | 144 |
| HBAC | 69 | 40 | 109 |
| IA | 63 | 38 | 101 |
| HBA | 49 | 28 | 77 |
| HIAC | 49 | 22 | 71 |
| HTOM | 42 | 25 | 67 |
| NHIA | 28 | 28 | 56 |
| HIA | 35 | 10 | 45 |
| NAC | 22 | 10 | 32 |
| HAAC | 21 | 7 | 28 |
| NHNAC | 13 | 9 | 22 |
| HNAC | 9 | 1 | 10 |
| HAA | 8 | 1 | 9 |
| NA | 6 | 2 | 8 |
| NHNA | 4 | 2 | 6 |
| HNA | 2 | 0 | 2 |
• Sangamon County population
30.1 mi, 
211°
• McLean County
37.3 mi, 
47°
• Tazewell County
27.4 mi, 
343°
• Macon County
28.3 mi, 
130°
• Woodford County
46.4 mi, 
10°
• Christian County
40.6 mi, 
173°
• Piatt County
41.7 mi, 
101°
• De Witt County
24.7 mi, 
81°
• Mason County
29.9 mi, 
284°
• Menard County
23.8 mi, 
252°
[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, Tazewell Illinois Notes
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