Last official estimated population of Ohio County was 6,108 (year 2014)[1]. This was 0.002% of total US population and 0.1% of total Indiana state population. Area of Ohio County is 87.4 mi² (=226.5 km²), in this year population density was 69.86 p/mi². If population growth rate would be same as in period 2010-2014 (-0.08%/yr), Ohio County population in 2021 would be 6,073 [0].
Historical population of Ohio County for period 1850-2014 [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
[1850-1860] +0.29 %/yr
[1860-1870] +0.67 %/yr
[1870-1880] -0.48 %/yr
[1880-1890] -1.15 %/yr
[1890-1900] -0.48 %/yr
[1900-1910] -0.87 %/yr
[1910-1920] -0.73 %/yr
[1920-1930] -0.71 %/yr
[1930-1940] +0.09 %/yr
[1940-1950] +1.11 %/yr
[1950-1960] -0.14 %/yr
[1960-1970] +0.29 %/yr
[1970-1980] +1.77 %/yr
[1980-1990] +0.39 %/yr
[1990-2000] +0.47 %/yr
[2000-2005] +1.31 %/yr
[2005-2010] +0.61 %/yr
[2010-2014] -0.08 %/yr
Looking for settlements in Ohio County? Visit this page: Settlements in Ohio County, IN
Population of Ohio County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 169 | 117 | 286 |
| 5 to 9 | 151 | 158 | 309 |
| 10 to 14 | 187 | 195 | 382 |
| 15 to 19 | 162 | 171 | 333 |
| 20 to 24 | 150 | 146 | 296 |
| 25 to 29 | 171 | 166 | 337 |
| 30 to 34 | 157 | 144 | 301 |
| 35 to 39 | 153 | 170 | 323 |
| 40 to 44 | 190 | 174 | 364 |
| 45 to 49 | 219 | 191 | 410 |
| 50 to 54 | 282 | 281 | 563 |
| 55 to 59 | 250 | 245 | 495 |
| 60 to 64 | 234 | 217 | 451 |
| 65 to 69 | 177 | 195 | 372 |
| 70 to 74 | 156 | 192 | 348 |
| 75 to 79 | 102 | 108 | 210 |
| 80 to 84 | 55 | 74 | 129 |
| 85+ | 42 | 84 | 126 |
Ohio 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 | 2977 | 2992 | 5,969 |
| NH | 2973 | 2992 | 5,965 |
| WA | 2951 | 2971 | 5,922 |
| NHWAC | 2945 | 2956 | 5,901 |
| NHWA | 2923 | 2937 | 5,860 |
| H | 34 | 36 | 70 |
| HWAC | 32 | 36 | 68 |
| HWA | 28 | 34 | 62 |
| TOM | 27 | 21 | 48 |
| BAC | 27 | 20 | 47 |
| NHBAC | 25 | 19 | 44 |
| NHTOM | 23 | 19 | 42 |
| AAC | 16 | 18 | 34 |
| NHAAC | 16 | 18 | 34 |
| IAC | 15 | 19 | 34 |
| NHIAC | 11 | 18 | 29 |
| BA | 16 | 12 | 28 |
| NHBA | 15 | 12 | 27 |
| AA | 9 | 16 | 25 |
| NHAA | 9 | 16 | 25 |
| IA | 4 | 8 | 12 |
| NHIA | 3 | 8 | 11 |
| HTOM | 4 | 2 | 6 |
| HIAC | 4 | 1 | 5 |
| HBAC | 2 | 1 | 3 |
| NAC | 2 | 0 | 2 |
| NHNAC | 2 | 0 | 2 |
| HBA | 1 | 0 | 1 |
| HIA | 1 | 0 | 1 |
| HNAC | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
• Hamilton County population
28.7 mi, 
51°
• Kenton County
23.2 mi, 
91°
• Boone County
12.7 mi, 
79°
• Dearborn County
14.4 mi, 
358°
• Jefferson County
27.8 mi, 
247°
• Ripley County
19.4 mi, 
304°
• Grant County
27.2 mi, 
137°
• Carroll County
20.7 mi, 
204°
• Switzerland County
8.7 mi, 203°
• Gallatin County
13.6 mi, 
156°
[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
*Dearborn Indiana Notes
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