Last official estimated population of Greene County was 161,614 (year 2014)[1]. This was 0.051% of total US population and 1.4% of total Ohio state population. Area of Greene County is 416.3 mi² (=1078.1 km²), in this year population density was 388.26 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Greene County population in 2025 would be 161,727 [0].
Historical population of Greene 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] +6.02 %/yr
[1820-1830] +3.46 %/yr
[1830-1840] +1.71 %/yr
[1840-1850] +2.27 %/yr
[1850-1860] +1.79 %/yr
[1860-1870] +0.68 %/yr
[1870-1880] +1.12 %/yr
[1880-1890] -0.5 %/yr
[1890-1900] +0.59 %/yr
[1900-1910] -0.61 %/yr
[1910-1920] +0.49 %/yr
[1920-1930] +0.63 %/yr
[1930-1940] +0.76 %/yr
[1940-1950] +5.09 %/yr
[1950-1960] +4.86 %/yr
[1960-1970] +2.83 %/yr
[1970-1980] +0.37 %/yr
[1980-1990] +0.52 %/yr
[1990-2000] +0.79 %/yr
[2000-2005] +1.1 %/yr
[2005-2010] +0.68 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Greene County? Visit this page: Settlements in Greene County, OH
Population of Greene County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 4680 | 4346 | 9,026 |
| 5 to 9 | 4695 | 4445 | 9,140 |
| 10 to 14 | 5052 | 4720 | 9,772 |
| 15 to 19 | 6126 | 6329 | 12,455 |
| 20 to 24 | 7364 | 7167 | 14,531 |
| 25 to 29 | 5954 | 5505 | 11,459 |
| 30 to 34 | 5144 | 4954 | 10,098 |
| 35 to 39 | 4355 | 4330 | 8,685 |
| 40 to 44 | 4545 | 4815 | 9,360 |
| 45 to 49 | 4903 | 5126 | 10,029 |
| 50 to 54 | 5724 | 6001 | 11,725 |
| 55 to 59 | 5686 | 6095 | 11,781 |
| 60 to 64 | 4940 | 5262 | 10,202 |
| 65 to 69 | 4171 | 4351 | 8,522 |
| 70 to 74 | 2745 | 3154 | 5,899 |
| 75 to 79 | 1990 | 2502 | 4,492 |
| 80 to 84 | 1410 | 1938 | 3,348 |
| 85+ | 1141 | 2155 | 3,296 |
Greene 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 | 78329 | 81085 | 159,414 |
| WAC | 72016 | 73859 | 145,875 |
| NHWAC | 69996 | 72005 | 142,001 |
| WA | 69945 | 71843 | 141,788 |
| NHWA | 68083 | 70115 | 138,198 |
| BAC | 6989 | 7283 | 14,272 |
| NHBAC | 6763 | 7050 | 13,813 |
| BA | 5837 | 6140 | 11,977 |
| NHBA | 5707 | 5989 | 11,696 |
| AAC | 3024 | 3402 | 6,426 |
| NHAAC | 2938 | 3335 | 6,273 |
| AA | 2319 | 2753 | 5,072 |
| NHAA | 2266 | 2713 | 4,979 |
| H | 2296 | 2110 | 4,406 |
| TOM | 2215 | 2153 | 4,368 |
| NHTOM | 2044 | 2013 | 4,057 |
| HWAC | 2020 | 1854 | 3,874 |
| HWA | 1862 | 1728 | 3,590 |
| IAC | 840 | 890 | 1,730 |
| NHIAC | 714 | 779 | 1,493 |
| IA | 234 | 255 | 489 |
| HBAC | 226 | 233 | 459 |
| NHIA | 178 | 209 | 387 |
| HTOM | 171 | 140 | 311 |
| NAC | 154 | 128 | 282 |
| HBA | 130 | 151 | 281 |
| HIAC | 126 | 111 | 237 |
| NHNAC | 121 | 116 | 237 |
| HAAC | 86 | 67 | 153 |
| NA | 75 | 51 | 126 |
| HIA | 56 | 46 | 102 |
| NHNA | 51 | 46 | 97 |
| HAA | 53 | 40 | 93 |
| HNAC | 33 | 12 | 45 |
| HNA | 24 | 5 | 29 |
• Montgomery County population
21.5 mi,
282°
• Butler County
39.6 mi,
244°
• Warren County
23.3 mi,
219°
• Clark County
16.9 mi,
20°
• Miami County
30.8 mi,
325°
• Highland County
38.1 mi,
155°
• Madison County
29.9 mi,
61°
• Clinton County
18.6 mi,
163°
• Champaign County
31.5 mi,
12°
• Fayette County
24.8 mi,
111°
[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, Ross Ohio Notes
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