Last official estimated population of Dearborn County was 50,093 (year 2014)[1]. This was 0.016% of total US population and 0.8% of total Indiana state population. Area of Dearborn County is 307.4 mi² (=796.2 km²), in this year population density was 162.95 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Dearborn County population in 2025 would be 50,220 [0].
Historical population of Dearborn 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] +4.61 %/yr
[1820-1830] +2 %/yr
[1830-1840] +3.3 %/yr
[1840-1850] +0.43 %/yr
[1850-1860] +1.93 %/yr
[1860-1870] -0.12 %/yr
[1870-1880] +1.01 %/yr
[1880-1890] -1.32 %/yr
[1890-1900] -0.51 %/yr
[1900-1910] -0.37 %/yr
[1910-1920] -0.66 %/yr
[1920-1930] +0.5 %/yr
[1930-1940] +0.91 %/yr
[1940-1950] +0.87 %/yr
[1950-1960] +1.32 %/yr
[1960-1970] +0.26 %/yr
[1970-1980] +1.54 %/yr
[1980-1990] +1.25 %/yr
[1990-2000] +1.74 %/yr
[2000-2005] +0.96 %/yr
[2005-2010] +0.66 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Dearborn County? Visit this page: Settlements in Dearborn County, IN
Population of Dearborn County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1418 | 1311 | 2,729 |
| 5 to 9 | 1639 | 1522 | 3,161 |
| 10 to 14 | 1777 | 1798 | 3,575 |
| 15 to 19 | 1697 | 1602 | 3,299 |
| 20 to 24 | 1464 | 1381 | 2,845 |
| 25 to 29 | 1318 | 1199 | 2,517 |
| 30 to 34 | 1359 | 1398 | 2,757 |
| 35 to 39 | 1413 | 1450 | 2,863 |
| 40 to 44 | 1697 | 1649 | 3,346 |
| 45 to 49 | 1764 | 1783 | 3,547 |
| 50 to 54 | 2076 | 2040 | 4,116 |
| 55 to 59 | 1851 | 1924 | 3,775 |
| 60 to 64 | 1682 | 1702 | 3,384 |
| 65 to 69 | 1283 | 1373 | 2,656 |
| 70 to 74 | 929 | 964 | 1,893 |
| 75 to 79 | 636 | 704 | 1,340 |
| 80 to 84 | 358 | 485 | 843 |
| 85+ | 281 | 579 | 860 |
Dearborn 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 | 24338 | 24562 | 48,900 |
| WAC | 24249 | 24499 | 48,748 |
| WA | 24017 | 24223 | 48,240 |
| NHWAC | 23968 | 24213 | 48,181 |
| NHWA | 23764 | 23951 | 47,715 |
| BAC | 329 | 288 | 617 |
| H | 304 | 302 | 606 |
| NHBAC | 308 | 275 | 583 |
| HWAC | 281 | 286 | 567 |
| HWA | 253 | 272 | 525 |
| TOM | 240 | 283 | 523 |
| NHTOM | 212 | 269 | 481 |
| BA | 221 | 147 | 368 |
| NHBA | 212 | 141 | 353 |
| AAC | 136 | 199 | 335 |
| NHAAC | 129 | 196 | 325 |
| IAC | 146 | 143 | 289 |
| NHIAC | 125 | 131 | 256 |
| AA | 95 | 151 | 246 |
| NHAA | 91 | 150 | 241 |
| IA | 56 | 45 | 101 |
| NHIA | 49 | 37 | 86 |
| NAC | 24 | 25 | 49 |
| NHNAC | 20 | 23 | 43 |
| HTOM | 28 | 14 | 42 |
| HBAC | 21 | 13 | 34 |
| HIAC | 21 | 12 | 33 |
| NA | 13 | 15 | 28 |
| NHNA | 10 | 14 | 24 |
| HBA | 9 | 6 | 15 |
| HIA | 7 | 8 | 15 |
| HAAC | 7 | 3 | 10 |
| HNAC | 4 | 2 | 6 |
| HAA | 4 | 1 | 5 |
| HNA | 3 | 1 | 4 |
• Hamilton County population
23.2 mi, 
81°
• Butler County
29.7 mi, 
47°
• Kenton County
28 mi, 
122°
• Boone County
17.7 mi, 
132°
• Ripley County
15.7 mi, 
257°
• Decatur County
30.2 mi, 
291°
• Franklin County
18.7 mi, 
344°
• Switzerland County
22.5 mi, 
187°
• Gallatin County
27.5 mi, 
167°
• Ohio County
14.4 mi, 
178°
[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, OH Indiana Notes
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