Last official estimated population of Preble County was 42,188 (year 2014)[1]. This was 0.013% of total US population and 0.4% of total Ohio state population. Area of Preble County is 426.6 mi² (=1104.8 km²), in this year population density was 98.90 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Preble County population in 2024 would be 41,984 [0].
Historical population of Preble County for period 1810-2014 [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
[1810-1820] +11.97 %/yr
[1820-1830] +4.76 %/yr
[1830-1840] +1.8 %/yr
[1840-1850] +1.1 %/yr
[1850-1860] +0.04 %/yr
[1860-1870] -0.01 %/yr
[1870-1880] +1.18 %/yr
[1880-1890] -0.46 %/yr
[1890-1900] +0.12 %/yr
[1900-1910] +0.05 %/yr
[1910-1920] -0.25 %/yr
[1920-1930] -0.34 %/yr
[1930-1940] +0.38 %/yr
[1940-1950] +1.5 %/yr
[1950-1960] +1.84 %/yr
[1960-1970] +0.66 %/yr
[1970-1980] +0.97 %/yr
[1980-1990] +0.48 %/yr
[1990-2000] +0.54 %/yr
[2000-2005] +0.11 %/yr
[2005-2010] -0.15 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Preble County? Visit this page: Settlements in Preble County, OH
Population of Preble County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1207 | 1085 | 2,292 |
| 5 to 9 | 1398 | 1347 | 2,745 |
| 10 to 14 | 1467 | 1405 | 2,872 |
| 15 to 19 | 1424 | 1274 | 2,698 |
| 20 to 24 | 1169 | 1079 | 2,248 |
| 25 to 29 | 1146 | 1108 | 2,254 |
| 30 to 34 | 1172 | 1200 | 2,372 |
| 35 to 39 | 1174 | 1184 | 2,358 |
| 40 to 44 | 1298 | 1307 | 2,605 |
| 45 to 49 | 1408 | 1380 | 2,788 |
| 50 to 54 | 1524 | 1615 | 3,139 |
| 55 to 59 | 1567 | 1626 | 3,193 |
| 60 to 64 | 1452 | 1435 | 2,887 |
| 65 to 69 | 1154 | 1272 | 2,426 |
| 70 to 74 | 808 | 912 | 1,720 |
| 75 to 79 | 637 | 711 | 1,348 |
| 80 to 84 | 342 | 495 | 837 |
| 85+ | 280 | 524 | 804 |
Preble 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 | 20485 | 20791 | 41,276 |
| WAC | 20266 | 20652 | 40,918 |
| NHWAC | 20134 | 20497 | 40,631 |
| WA | 20033 | 20436 | 40,469 |
| NHWA | 19906 | 20286 | 40,192 |
| TOM | 239 | 225 | 464 |
| NHTOM | 234 | 219 | 453 |
| BAC | 262 | 182 | 444 |
| NHBAC | 255 | 175 | 430 |
| IAC | 172 | 172 | 344 |
| AAC | 163 | 180 | 343 |
| NHAAC | 162 | 180 | 342 |
| NHIAC | 165 | 161 | 326 |
| H | 142 | 168 | 310 |
| HWAC | 132 | 155 | 287 |
| NHAA | 131 | 148 | 279 |
| AA | 131 | 148 | 279 |
| HWA | 127 | 150 | 277 |
| BA | 164 | 99 | 263 |
| NHBA | 160 | 95 | 255 |
| IA | 58 | 49 | 107 |
| NHIA | 52 | 42 | 94 |
| HIAC | 7 | 11 | 18 |
| NAC | 8 | 6 | 14 |
| HBAC | 7 | 7 | 14 |
| NHNAC | 8 | 5 | 13 |
| HIA | 6 | 7 | 13 |
| HTOM | 5 | 6 | 11 |
| HBA | 4 | 4 | 8 |
| NA | 2 | 2 | 4 |
| NHNA | 2 | 1 | 3 |
| HAAC | 1 | 0 | 1 |
| HNAC | 0 | 1 | 1 |
| HNA | 0 | 1 | 1 |
| HAA | 0 | 0 | 0 |
• Montgomery County population
18.8 mi, 
86°
• Butler County
21.1 mi, 
168°
• Warren County
33.3 mi, 
130°
• Miami County
31 mi, 
45°
• Wayne County
21 mi, 
294°
• Darke County
27.2 mi, 
2°
• Randolph County
35.1 mi, 
326°
• Fayette County
29.5 mi, 
256°
• Franklin County
32 mi, 
224°
• Union County
16.9 mi, 
241°
[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
*Hamilton; 1810: Prebble Ohio Notes
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