Last official estimated population of DeKalb County was 71,118 (year 2014)[1]. This was 0.022% of total US population and 1.5% of total Alabama state population. Area of DeKalb County is 778.7 mi² (=2016.8 km²), in this year population density was 91.33 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), DeKalb County population in 2025 would be 71,143 [0].
Historical population of DeKalb County for period 1840-2014 [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

[1840-1850] +3.35 %/yr
[1850-1860] +2.65 %/yr
[1860-1870] -3.99 %/yr
[1870-1880] +5.93 %/yr
[1880-1890] +5.23 %/yr
[1890-1900] +1.11 %/yr
[1900-1910] +1.84 %/yr
[1910-1920] +1.99 %/yr
[1920-1930] +1.54 %/yr
[1930-1940] +0.72 %/yr
[1940-1950] +0.45 %/yr
[1950-1960] -0.84 %/yr
[1960-1970] +0.14 %/yr
[1970-1980] +2.48 %/yr
[1980-1990] +0.18 %/yr
[1990-2000] +1.66 %/yr
[2000-2005] +1.02 %/yr
[2005-2010] +0.96 %/yr
[2010-2014] +0 %/yr
Looking for settlements in DeKalb County? Visit this page: Settlements in DeKalb County, AL
Population of DeKalb County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2235 | 2166 | 4,401 |
| 5 to 9 | 2532 | 2518 | 5,050 |
| 10 to 14 | 2629 | 2528 | 5,157 |
| 15 to 19 | 2368 | 2191 | 4,559 |
| 20 to 24 | 2267 | 2245 | 4,512 |
| 25 to 29 | 2041 | 2008 | 4,049 |
| 30 to 34 | 2120 | 2147 | 4,267 |
| 35 to 39 | 2258 | 2255 | 4,513 |
| 40 to 44 | 2453 | 2421 | 4,874 |
| 45 to 49 | 2364 | 2363 | 4,727 |
| 50 to 54 | 2396 | 2459 | 4,855 |
| 55 to 59 | 2355 | 2363 | 4,718 |
| 60 to 64 | 2041 | 2183 | 4,224 |
| 65 to 69 | 1842 | 2041 | 3,883 |
| 70 to 74 | 1368 | 1455 | 2,823 |
| 75 to 79 | 889 | 1151 | 2,040 |
| 80 to 84 | 540 | 810 | 1,350 |
| 85+ | 326 | 737 | 1,063 |
DeKalb 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 |
| WAC | 33077 | 34086 | 67,163 |
| WA | 32357 | 33342 | 65,699 |
| NH | 29913 | 31056 | 60,969 |
| NHWAC | 28740 | 29819 | 58,559 |
| NHWA | 28118 | 29170 | 57,288 |
| H | 5111 | 4985 | 10,096 |
| HWAC | 4337 | 4267 | 8,604 |
| HWA | 4239 | 4172 | 8,411 |
| IAC | 1303 | 1356 | 2,659 |
| BAC | 935 | 941 | 1,876 |
| NHIAC | 899 | 963 | 1,862 |
| TOM | 769 | 788 | 1,557 |
| NHBAC | 777 | 779 | 1,556 |
| IA | 746 | 780 | 1,526 |
| BA | 752 | 755 | 1,507 |
| NHTOM | 650 | 676 | 1,326 |
| NHBA | 629 | 632 | 1,261 |
| NHIA | 420 | 458 | 878 |
| HIAC | 404 | 393 | 797 |
| HIA | 326 | 322 | 648 |
| NAC | 313 | 263 | 576 |
| NA | 283 | 234 | 517 |
| HNAC | 273 | 228 | 501 |
| HNA | 257 | 215 | 472 |
| AAC | 177 | 198 | 375 |
| HBAC | 158 | 162 | 320 |
| NHAAC | 117 | 142 | 259 |
| AA | 117 | 142 | 259 |
| HBA | 123 | 123 | 246 |
| HTOM | 119 | 112 | 231 |
| NHAA | 70 | 101 | 171 |
| HAAC | 60 | 56 | 116 |
| HAA | 47 | 41 | 88 |
| NHNAC | 40 | 35 | 75 |
| NHNA | 26 | 19 | 45 |
• Madison County population
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36.3 mi,
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31.3 mi,
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34.1 mi,
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23.2 mi,
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[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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