Last official estimated population of Ohio County was 44,479 (year 2014)[1]. This was 0.014% of total US population and 2.4% of total West Virginia state population. Area of Ohio County is 109.0 mi² (=282.4 km²), in this year population density was 407.97 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Ohio County population in 2024 would be 44,569 [0].
Historical population of Ohio County for period 1790-2014 [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
[1790-1800] -0.94 %/yr
[1800-1810] +5.6 %/yr
[1810-1820] +1.17 %/yr
[1820-1830] +5.43 %/yr
[1830-1840] -1.53 %/yr
[1840-1850] +3.03 %/yr
[1850-1860] +2.22 %/yr
[1860-1870] +2.55 %/yr
[1870-1880] +2.65 %/yr
[1880-1890] +1.04 %/yr
[1890-1900] +1.46 %/yr
[1900-1910] +1.83 %/yr
[1910-1920] +0.89 %/yr
[1920-1930] +1.37 %/yr
[1930-1940] +0.14 %/yr
[1940-1950] -0.2 %/yr
[1950-1960] -0.46 %/yr
[1960-1970] -0.64 %/yr
[1970-1980] -0.45 %/yr
[1980-1990] -1.86 %/yr
[1990-2000] -0.7 %/yr
[2000-2005] -1 %/yr
[2005-2010] -0.3 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Ohio County? Visit this page: Settlements in Ohio County, WV
Population of Ohio County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1170 | 1219 | 2,389 |
| 5 to 9 | 1182 | 1070 | 2,252 |
| 10 to 14 | 1119 | 1119 | 2,238 |
| 15 to 19 | 1443 | 1500 | 2,943 |
| 20 to 24 | 1576 | 1624 | 3,200 |
| 25 to 29 | 1181 | 1213 | 2,394 |
| 30 to 34 | 1244 | 1153 | 2,397 |
| 35 to 39 | 1192 | 1108 | 2,300 |
| 40 to 44 | 1183 | 1258 | 2,441 |
| 45 to 49 | 1253 | 1303 | 2,556 |
| 50 to 54 | 1449 | 1584 | 3,033 |
| 55 to 59 | 1702 | 1766 | 3,468 |
| 60 to 64 | 1557 | 1709 | 3,266 |
| 65 to 69 | 1233 | 1332 | 2,565 |
| 70 to 74 | 815 | 972 | 1,787 |
| 75 to 79 | 603 | 846 | 1,449 |
| 80 to 84 | 428 | 811 | 1,239 |
| 85+ | 416 | 995 | 1,411 |
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 |
| NH | 20484 | 22373 | 42,857 |
| WAC | 19667 | 21576 | 41,243 |
| NHWAC | 19450 | 21382 | 40,832 |
| WA | 19262 | 21139 | 40,401 |
| NHWA | 19062 | 20962 | 40,024 |
| BAC | 1130 | 1063 | 2,193 |
| NHBAC | 1087 | 1040 | 2,127 |
| BA | 840 | 756 | 1,596 |
| NHBA | 812 | 747 | 1,559 |
| TOM | 428 | 453 | 881 |
| NHTOM | 409 | 433 | 842 |
| AAC | 227 | 257 | 484 |
| NHAAC | 220 | 252 | 472 |
| H | 262 | 209 | 471 |
| HWAC | 217 | 194 | 411 |
| HWA | 200 | 177 | 377 |
| AA | 167 | 202 | 369 |
| NHAA | 166 | 201 | 367 |
| IAC | 159 | 149 | 308 |
| NHIAC | 138 | 141 | 279 |
| IA | 41 | 27 | 68 |
| HBAC | 43 | 23 | 66 |
| NHIA | 30 | 27 | 57 |
| NAC | 22 | 22 | 44 |
| HTOM | 19 | 20 | 39 |
| HBA | 28 | 9 | 37 |
| NHNAC | 17 | 14 | 31 |
| HIAC | 21 | 8 | 29 |
| NA | 8 | 5 | 13 |
| HNAC | 5 | 8 | 13 |
| HAAC | 7 | 5 | 12 |
| HIA | 11 | 0 | 11 |
| NHNA | 5 | 3 | 8 |
| HNA | 3 | 2 | 5 |
| HAA | 1 | 1 | 2 |
• Washington County population
20.7 mi, 
70°
• Belmont County
19.2 mi, 
252°
• Jefferson County
22.1 mi, 
340°
• Greene County
27.2 mi, 
129°
• Marshall County
17.1 mi, 
189°
• Hancock County
29 mi, 
5°
• Brooke County
12.2 mi, 10°
• Wetzel County
34.4 mi, 
180°
• Harrison County
28.2 mi, 
298°
• Monroe County
35.8 mi, 
224°
[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
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