Last official estimated population of DeKalb County was 18,727 (year 2014)[1]. This was 0.006% of total US population and 0.3% of total Tennessee state population. Area of DeKalb County is 329.0 mi² (=852.1 km²), in this year population density was 56.92 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), DeKalb County population in 2026 would be 18,739 [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] +3.17 %/yr
[1850-1860] +2.81 %/yr
[1860-1870] +0.78 %/yr
[1870-1880] +2.63 %/yr
[1880-1890] +0.55 %/yr
[1890-1900] +0.51 %/yr
[1900-1910] -0.64 %/yr
[1910-1920] -0.04 %/yr
[1920-1930] -0.78 %/yr
[1930-1940] +0.26 %/yr
[1940-1950] -2.2 %/yr
[1950-1960] -0.8 %/yr
[1960-1970] +0.34 %/yr
[1970-1980] +2 %/yr
[1980-1990] +0.55 %/yr
[1990-2000] +1.95 %/yr
[2000-2005] +0.83 %/yr
[2005-2010] +0.62 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in DeKalb County? Visit this page: Settlements in DeKalb County, TN
Population of DeKalb County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 597 | 524 | 1,121 |
| 5 to 9 | 645 | 611 | 1,256 |
| 10 to 14 | 634 | 578 | 1,212 |
| 15 to 19 | 601 | 552 | 1,153 |
| 20 to 24 | 604 | 509 | 1,113 |
| 25 to 29 | 601 | 548 | 1,149 |
| 30 to 34 | 572 | 554 | 1,126 |
| 35 to 39 | 542 | 550 | 1,092 |
| 40 to 44 | 629 | 618 | 1,247 |
| 45 to 49 | 661 | 634 | 1,295 |
| 50 to 54 | 708 | 728 | 1,436 |
| 55 to 59 | 658 | 723 | 1,381 |
| 60 to 64 | 640 | 681 | 1,321 |
| 65 to 69 | 578 | 603 | 1,181 |
| 70 to 74 | 404 | 480 | 884 |
| 75 to 79 | 247 | 340 | 587 |
| 80 to 84 | 137 | 223 | 360 |
| 85+ | 105 | 249 | 354 |
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 | 9273 | 9444 | 18,717 |
| WA | 9141 | 9328 | 18,469 |
| NH | 8738 | 9088 | 17,826 |
| NHWAC | 8528 | 8894 | 17,422 |
| NHWA | 8425 | 8795 | 17,220 |
| H | 825 | 617 | 1,442 |
| HWAC | 745 | 550 | 1,295 |
| HWA | 716 | 533 | 1,249 |
| BAC | 277 | 240 | 517 |
| BA | 225 | 183 | 408 |
| NHBAC | 197 | 189 | 386 |
| NHBA | 156 | 138 | 294 |
| TOM | 135 | 123 | 258 |
| NHTOM | 106 | 106 | 212 |
| IAC | 104 | 84 | 188 |
| NHIAC | 79 | 67 | 146 |
| HBAC | 80 | 51 | 131 |
| HBA | 69 | 45 | 114 |
| AAC | 42 | 59 | 101 |
| NHAAC | 39 | 45 | 84 |
| AA | 26 | 47 | 73 |
| IA | 35 | 23 | 58 |
| NHAA | 24 | 34 | 58 |
| HTOM | 29 | 17 | 46 |
| HIAC | 25 | 17 | 42 |
| NHIA | 26 | 15 | 41 |
| HIA | 9 | 8 | 17 |
| HAAC | 3 | 14 | 17 |
| HAA | 2 | 13 | 15 |
| NAC | 5 | 4 | 9 |
| NHNAC | 4 | 2 | 6 |
| HNAC | 1 | 2 | 3 |
| NA | 1 | 1 | 2 |
| NHNA | 1 | 0 | 1 |
| HNA | 0 | 1 | 1 |
• Rutherford County population
34 mi, 
253°
• Wilson County
27.8 mi, 
293°
• Putnam County
21.7 mi, 
60°
• Warren County
21.5 mi, 
171°
• White County
21.6 mi, 
100°
• Smith County
19.5 mi, 
342°
• Cannon County
17.7 mi, 
225°
• Jackson County
26.9 mi, 
19°
• Trousdale County
33.3 mi, 
327°
• Van Buren County
29 mi, 
133°
[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
See note 13 Tennessee Notes
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