Last official estimated population of Logan County was 45,774 (year 2014)[1]. This was 0.014% of total US population and 0.4% of total Ohio state population. Area of Logan County is 466.8 mi² (=1208.9 km²), in this year population density was 98.07 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Logan County population in 2026 would be 45,523 [0].
Historical population of Logan County for period 1820-2014 [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

[1820-1830] +7.38 %/yr
[1830-1840] +8.09 %/yr
[1840-1850] +3.18 %/yr
[1850-1860] +0.92 %/yr
[1860-1870] +0.93 %/yr
[1870-1880] +1.32 %/yr
[1880-1890] +0.42 %/yr
[1890-1900] +1.06 %/yr
[1900-1910] -0.11 %/yr
[1910-1920] +0.01 %/yr
[1920-1930] -0.38 %/yr
[1930-1940] +0.22 %/yr
[1940-1950] +0.56 %/yr
[1950-1960] +1.06 %/yr
[1960-1970] +0.08 %/yr
[1970-1980] +1.11 %/yr
[1980-1990] +0.78 %/yr
[1990-2000] +0.84 %/yr
[2000-2005] +0.03 %/yr
[2005-2010] -0.09 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Logan County? Visit this page: Settlements in Logan County, OH
Population of Logan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1417 | 1314 | 2,731 |
| 5 to 9 | 1531 | 1494 | 3,025 |
| 10 to 14 | 1588 | 1548 | 3,136 |
| 15 to 19 | 1567 | 1449 | 3,016 |
| 20 to 24 | 1325 | 1277 | 2,602 |
| 25 to 29 | 1217 | 1258 | 2,475 |
| 30 to 34 | 1217 | 1316 | 2,533 |
| 35 to 39 | 1301 | 1360 | 2,661 |
| 40 to 44 | 1472 | 1369 | 2,841 |
| 45 to 49 | 1432 | 1534 | 2,966 |
| 50 to 54 | 1752 | 1725 | 3,477 |
| 55 to 59 | 1756 | 1698 | 3,454 |
| 60 to 64 | 1529 | 1552 | 3,081 |
| 65 to 69 | 1195 | 1308 | 2,503 |
| 70 to 74 | 884 | 982 | 1,866 |
| 75 to 79 | 603 | 731 | 1,334 |
| 80 to 84 | 368 | 538 | 906 |
| 85+ | 302 | 598 | 900 |
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 | 22126 | 22736 | 44,862 |
| WAC | 21776 | 22383 | 44,159 |
| NHWAC | 21475 | 22096 | 43,571 |
| WA | 21351 | 21932 | 43,283 |
| NHWA | 21068 | 21667 | 42,735 |
| BAC | 757 | 683 | 1,440 |
| NHBAC | 739 | 655 | 1,394 |
| TOM | 448 | 483 | 931 |
| NHTOM | 428 | 460 | 888 |
| BA | 464 | 365 | 829 |
| NHBA | 452 | 350 | 802 |
| H | 330 | 315 | 645 |
| HWAC | 301 | 287 | 588 |
| HWA | 283 | 265 | 548 |
| AAC | 189 | 258 | 447 |
| NHAAC | 181 | 252 | 433 |
| IAC | 179 | 185 | 364 |
| NHIAC | 158 | 169 | 327 |
| AA | 123 | 195 | 318 |
| NHAA | 121 | 191 | 312 |
| IA | 65 | 65 | 130 |
| NHIA | 52 | 57 | 109 |
| NAC | 24 | 32 | 56 |
| NHNAC | 22 | 30 | 52 |
| HBAC | 18 | 28 | 46 |
| HTOM | 20 | 23 | 43 |
| HIAC | 21 | 16 | 37 |
| HBA | 12 | 15 | 27 |
| HIA | 13 | 8 | 21 |
| NA | 5 | 11 | 16 |
| NHNA | 5 | 11 | 16 |
| HAAC | 8 | 6 | 14 |
| HAA | 2 | 4 | 6 |
| HNAC | 2 | 2 | 4 |
| HNA | 0 | 0 | 0 |
• Clark County population
32.5 mi,
181°
• Allen County
32 mi,
326°
• Miami County
33.6 mi,
226°
• Marion County
34.3 mi,
66°
• Union County
22 mi,
106°
• Shelby County
23.3 mi,
261°
• Auglaize County
26.9 mi,
296°
• Madison County
39 mi,
150°
• Champaign County
17.6 mi,
180°
• Hardin County
19.6 mi,
15°
[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
*Champaign Ohio Notes
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