Last official estimated population of Cobb County was 689,692 (year 2014)[1]. This was 0.216% of total US population and 6.8% of total Georgia state population. Area of Cobb County is 344.5 mi² (=892.3 km²), in this year population density was 2,001.90 p/mi². If population growth rate would be same as in period 2010-2014 (+0.06%/yr), Cobb County population in 2026 would be 694,557 [0].
Historical population of Cobb 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] +6.27 %/yr
[1850-1860] +0.28 %/yr
[1860-1870] -0.3 %/yr
[1870-1880] +4.15 %/yr
[1880-1890] +0.72 %/yr
[1890-1900] +1.02 %/yr
[1900-1910] +1.42 %/yr
[1910-1920] +0.7 %/yr
[1920-1930] +1.52 %/yr
[1930-1940] +0.78 %/yr
[1940-1950] +4.91 %/yr
[1950-1960] +6.33 %/yr
[1960-1970] +5.6 %/yr
[1970-1980] +4.23 %/yr
[1980-1990] +4.17 %/yr
[1990-2000] +3.1 %/yr
[2000-2005] +1.26 %/yr
[2005-2010] +1.25 %/yr
[2010-2014] +0.06 %/yr
Looking for settlements in Cobb County? Visit this page: Settlements in Cobb County, GA
Population of Cobb County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 24475 | 23795 | 48,270 |
| 5 to 9 | 25507 | 24998 | 50,505 |
| 10 to 14 | 25860 | 25388 | 51,248 |
| 15 to 19 | 25111 | 23817 | 48,928 |
| 20 to 24 | 25046 | 24354 | 49,400 |
| 25 to 29 | 25421 | 26193 | 51,614 |
| 30 to 34 | 25282 | 27468 | 52,750 |
| 35 to 39 | 24884 | 27433 | 52,317 |
| 40 to 44 | 26912 | 29353 | 56,265 |
| 45 to 49 | 25811 | 28054 | 53,865 |
| 50 to 54 | 25531 | 28142 | 53,673 |
| 55 to 59 | 22388 | 24521 | 46,909 |
| 60 to 64 | 17757 | 20113 | 37,870 |
| 65 to 69 | 13699 | 16279 | 29,978 |
| 70 to 74 | 8651 | 10307 | 18,958 |
| 75 to 79 | 5335 | 6997 | 12,332 |
| 80 to 84 | 3329 | 4799 | 8,128 |
| 85+ | 2450 | 5521 | 7,971 |
Cobb 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 | 305610 | 332359 | 637,969 |
| WAC | 240699 | 246535 | 487,234 |
| WA | 233683 | 238854 | 472,537 |
| NHWAC | 198726 | 207443 | 406,169 |
| NHWA | 192854 | 200965 | 393,819 |
| BAC | 96299 | 114014 | 210,313 |
| NHBAC | 91334 | 108647 | 199,981 |
| BA | 91411 | 108322 | 199,733 |
| NHBA | 87249 | 103832 | 191,081 |
| H | 47839 | 45173 | 93,012 |
| HWAC | 41973 | 39092 | 81,065 |
| HWA | 40829 | 37889 | 78,718 |
| AAC | 20825 | 22282 | 43,107 |
| NHAAC | 20309 | 21677 | 41,986 |
| AA | 18128 | 19385 | 37,513 |
| NHAA | 17871 | 19065 | 36,936 |
| TOM | 8134 | 9051 | 17,185 |
| NHTOM | 6815 | 7675 | 14,490 |
| HBAC | 4965 | 5367 | 10,332 |
| HBA | 4162 | 4490 | 8,652 |
| IAC | 3888 | 4110 | 7,998 |
| NHIAC | 2245 | 2586 | 4,831 |
| IA | 1811 | 1679 | 3,490 |
| HIAC | 1643 | 1524 | 3,167 |
| HTOM | 1319 | 1376 | 2,695 |
| HIA | 1130 | 991 | 2,121 |
| NHIA | 681 | 688 | 1,369 |
| NAC | 570 | 575 | 1,145 |
| HAAC | 516 | 605 | 1,121 |
| NHNAC | 355 | 405 | 760 |
| HAA | 257 | 320 | 577 |
| NA | 282 | 241 | 523 |
| HNAC | 215 | 170 | 385 |
| NHNA | 140 | 134 | 274 |
| HNA | 142 | 107 | 249 |
• Fulton County population
12 mi, 
149°
• Gwinnett County
31.6 mi, 
87°
• DeKalb County
23.1 mi, 
120°
• Clayton County
30.2 mi, 
155°
• Cherokee County
21.8 mi, 
15°
• Forsyth County
32.3 mi, 
52°
• Paulding County
16.8 mi, 
265°
• Douglas County
19.9 mi, 
213°
• Bartow County
25.7 mi, 
324°
• Polk County
35.4 mi, 
276°
[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 23 Georgia Notes
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