Last official estimated population of Decatur County was 27,821 (year 2014)[1]. This was 0.009% of total US population and 0.3% of total Georgia state population. Area of Decatur County is 623.2 mi² (=1614 km²), in this year population density was 44.64 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Decatur County population in 2025 would be 27,763 [0].
Historical population of Decatur County for period 1830-2014 [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
[1830-1840] +4.3 %/yr
[1840-1850] +3.47 %/yr
[1850-1860] +3.74 %/yr
[1860-1870] +2.45 %/yr
[1870-1880] +2.31 %/yr
[1880-1890] +0.45 %/yr
[1890-1900] +3.97 %/yr
[1900-1910] -0.14 %/yr
[1910-1920] +0.91 %/yr
[1920-1930] -2.92 %/yr
[1930-1940] -0.6 %/yr
[1940-1950] +0.61 %/yr
[1950-1960] +0.65 %/yr
[1960-1970] -1.21 %/yr
[1970-1980] +1.34 %/yr
[1980-1990] +0.01 %/yr
[1990-2000] +1.02 %/yr
[2000-2005] -0.53 %/yr
[2005-2010] +0.24 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Decatur County? Visit this page: Settlements in Decatur County, GA
Population of Decatur County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 996 | 883 | 1,879 |
| 5 to 9 | 895 | 915 | 1,810 |
| 10 to 14 | 966 | 914 | 1,880 |
| 15 to 19 | 939 | 909 | 1,848 |
| 20 to 24 | 1008 | 889 | 1,897 |
| 25 to 29 | 832 | 793 | 1,625 |
| 30 to 34 | 773 | 868 | 1,641 |
| 35 to 39 | 792 | 783 | 1,575 |
| 40 to 44 | 819 | 890 | 1,709 |
| 45 to 49 | 891 | 925 | 1,816 |
| 50 to 54 | 959 | 957 | 1,916 |
| 55 to 59 | 882 | 963 | 1,845 |
| 60 to 64 | 740 | 835 | 1,575 |
| 65 to 69 | 618 | 703 | 1,321 |
| 70 to 74 | 474 | 578 | 1,052 |
| 75 to 79 | 317 | 473 | 790 |
| 80 to 84 | 189 | 346 | 535 |
| 85+ | 148 | 358 | 506 |
Decatur 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 | 12418 | 13274 | 25,692 |
| WAC | 7621 | 7804 | 15,425 |
| WA | 7490 | 7659 | 15,149 |
| NHWAC | 7010 | 7263 | 14,273 |
| NHWA | 6902 | 7138 | 14,040 |
| BAC | 5479 | 6039 | 11,518 |
| BA | 5390 | 5937 | 11,327 |
| NHBAC | 5356 | 5945 | 11,301 |
| NHBA | 5286 | 5858 | 11,144 |
| H | 820 | 708 | 1,528 |
| HWAC | 611 | 541 | 1,152 |
| HWA | 588 | 521 | 1,109 |
| IAC | 157 | 162 | 319 |
| TOM | 145 | 164 | 309 |
| NHTOM | 119 | 141 | 260 |
| AAC | 106 | 125 | 231 |
| HBAC | 123 | 94 | 217 |
| IA | 107 | 110 | 217 |
| NHAAC | 90 | 120 | 210 |
| HBA | 104 | 79 | 183 |
| AA | 86 | 97 | 183 |
| NHAA | 72 | 93 | 165 |
| NHIAC | 78 | 82 | 160 |
| HIAC | 79 | 80 | 159 |
| HIA | 71 | 69 | 140 |
| NHIA | 36 | 41 | 77 |
| HTOM | 26 | 23 | 49 |
| NAC | 22 | 21 | 43 |
| NA | 20 | 15 | 35 |
| HNAC | 17 | 13 | 30 |
| HNA | 17 | 12 | 29 |
| HAAC | 16 | 5 | 21 |
| HAA | 14 | 4 | 18 |
| NHNAC | 5 | 8 | 13 |
| NHNA | 3 | 3 | 6 |
• Leon County population
34.3 mi, 
147°
• Jackson County
37.6 mi, 
260°
• Gadsden County
20.9 mi, 
184°
• Thomas County
39.4 mi, 
91°
• Grady County
20.1 mi, 90°
• Mitchell County
33.4 mi, 
43°
• Early County
36.1 mi, 
328°
• Seminole County
17.2 mi, 
282°
• Miller County
21.3 mi, 
336°
• Baker County
31.3 mi, 
14°
[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
*Early Georgia Notes
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