Last official estimated population of Adams County was 28,568 (year 2014)[1]. This was 0.009% of total US population and 0.2% of total Ohio state population. Area of Adams County is 586.2 mi² (=1518.4 km²), in this year population density was 48.73 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Adams County population in 2025 would be 28,618 [0].
Historical population of Adams County for period 1800-2014 [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
[1800-1810] +10.64 %/yr
[1810-1820] +0.99 %/yr
[1820-1830] +1.67 %/yr
[1830-1840] +0.71 %/yr
[1840-1850] +3.66 %/yr
[1850-1860] +0.73 %/yr
[1860-1870] +0.22 %/yr
[1870-1880] +1.47 %/yr
[1880-1890] +0.84 %/yr
[1890-1900] +0.09 %/yr
[1900-1910] -0.61 %/yr
[1910-1920] -0.99 %/yr
[1920-1930] -0.94 %/yr
[1930-1940] +0.63 %/yr
[1940-1950] -0.57 %/yr
[1950-1960] -0.26 %/yr
[1960-1970] -0.53 %/yr
[1970-1980] +2.53 %/yr
[1980-1990] +0.42 %/yr
[1990-2000] +0.74 %/yr
[2000-2005] +0.88 %/yr
[2005-2010] +0.02 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Adams County? Visit this page: Settlements in Adams County, OH
Population of Adams County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 832 | 876 | 1,708 |
| 5 to 9 | 1008 | 929 | 1,937 |
| 10 to 14 | 1045 | 1024 | 2,069 |
| 15 to 19 | 868 | 894 | 1,762 |
| 20 to 24 | 754 | 805 | 1,559 |
| 25 to 29 | 724 | 749 | 1,473 |
| 30 to 34 | 747 | 804 | 1,551 |
| 35 to 39 | 818 | 837 | 1,655 |
| 40 to 44 | 940 | 928 | 1,868 |
| 45 to 49 | 963 | 932 | 1,895 |
| 50 to 54 | 999 | 1058 | 2,057 |
| 55 to 59 | 1032 | 1055 | 2,087 |
| 60 to 64 | 930 | 903 | 1,833 |
| 65 to 69 | 793 | 768 | 1,561 |
| 70 to 74 | 573 | 637 | 1,210 |
| 75 to 79 | 399 | 433 | 832 |
| 80 to 84 | 238 | 347 | 585 |
| 85+ | 203 | 284 | 487 |
Adams 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 | 13754 | 14145 | 27,899 |
| WAC | 13670 | 14104 | 27,774 |
| NHWAC | 13567 | 13995 | 27,562 |
| WA | 13491 | 13900 | 27,391 |
| NHWA | 13388 | 13797 | 27,185 |
| TOM | 187 | 208 | 395 |
| NHTOM | 186 | 202 | 388 |
| IAC | 178 | 176 | 354 |
| NHIAC | 173 | 166 | 339 |
| BAC | 159 | 139 | 298 |
| NHBAC | 155 | 135 | 290 |
| H | 112 | 118 | 230 |
| HWAC | 103 | 109 | 212 |
| HWA | 103 | 103 | 206 |
| BA | 94 | 63 | 157 |
| NHBA | 91 | 61 | 152 |
| IA | 72 | 62 | 134 |
| NHIA | 68 | 56 | 124 |
| AAC | 42 | 51 | 93 |
| NHAAC | 41 | 50 | 91 |
| AA | 21 | 29 | 50 |
| NHAA | 20 | 28 | 48 |
| HIAC | 5 | 10 | 15 |
| NHNAC | 5 | 7 | 12 |
| NAC | 5 | 7 | 12 |
| HIA | 4 | 6 | 10 |
| HBAC | 4 | 4 | 8 |
| HTOM | 1 | 6 | 7 |
| HBA | 3 | 2 | 5 |
| NA | 1 | 1 | 2 |
| NHNA | 1 | 1 | 2 |
| HAAC | 1 | 1 | 2 |
| HAA | 1 | 1 | 2 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Scioto County population
25.8 mi, 
93°
• Brown County
22 mi, 
287°
• Highland County
25.1 mi, 
344°
• Greenup County
34.8 mi, 
122°
• Pike County
28.1 mi, 
54°
• Mason County
25.1 mi, 
228°
• Fleming County
34.5 mi, 
200°
• Lewis County
20.3 mi, 
164°
• Bracken County
35.9 mi, 
252°
• Robertson County
38.6 mi, 234°
[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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