Last official estimated population of Jefferson County was 658,302 (year 2014)[1]. This was 0.206% of total US population and 13.5% of total Alabama state population. Area of Jefferson County is 1,123.8 mi² (=2910.7 km²), in this year population density was 585.77 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Jefferson County population in 2024 would be 657,892 [0].
Historical population of Jefferson 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] +0.4 %/yr
[1840-1850] +2.34 %/yr
[1850-1860] +2.71 %/yr
[1860-1870] +0.5 %/yr
[1870-1880] +6.55 %/yr
[1880-1890] +14.29 %/yr
[1890-1900] +4.72 %/yr
[1900-1910] +4.9 %/yr
[1910-1920] +3.19 %/yr
[1920-1930] +3.36 %/yr
[1930-1940] +0.64 %/yr
[1940-1950] +1.97 %/yr
[1950-1960] +1.28 %/yr
[1960-1970] +0.16 %/yr
[1970-1980] +0.4 %/yr
[1980-1990] -0.3 %/yr
[1990-2000] +0.16 %/yr
[2000-2005] -0.22 %/yr
[2005-2010] +0.11 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Jefferson County? Visit this page: Settlements in Jefferson County, AL
Population of Jefferson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 22132 | 21366 | 43,498 |
| 5 to 9 | 21789 | 21124 | 42,913 |
| 10 to 14 | 20959 | 20673 | 41,632 |
| 15 to 19 | 20605 | 20421 | 41,026 |
| 20 to 24 | 21793 | 22713 | 44,506 |
| 25 to 29 | 22887 | 25585 | 48,472 |
| 30 to 34 | 22177 | 24420 | 46,597 |
| 35 to 39 | 19961 | 22136 | 42,097 |
| 40 to 44 | 20110 | 21699 | 41,809 |
| 45 to 49 | 19277 | 21405 | 40,682 |
| 50 to 54 | 21638 | 24221 | 45,859 |
| 55 to 59 | 21492 | 25029 | 46,521 |
| 60 to 64 | 18725 | 22081 | 40,806 |
| 65 to 69 | 14144 | 16845 | 30,989 |
| 70 to 74 | 9350 | 12243 | 21,593 |
| 75 to 79 | 6288 | 9580 | 15,868 |
| 80 to 84 | 4469 | 7775 | 12,244 |
| 85+ | 4247 | 9434 | 13,681 |
Jefferson 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 | 298700 | 337265 | 635,965 |
| WAC | 176216 | 186916 | 363,132 |
| WA | 173116 | 183625 | 356,741 |
| NHWAC | 164786 | 176991 | 341,777 |
| NHWA | 161982 | 173912 | 335,894 |
| BAC | 130901 | 156544 | 287,445 |
| NHBAC | 129489 | 155327 | 284,816 |
| BA | 128992 | 154433 | 283,425 |
| NHBA | 127759 | 153343 | 281,102 |
| H | 13343 | 11485 | 24,828 |
| HWAC | 11430 | 9925 | 21,355 |
| HWA | 11134 | 9713 | 20,847 |
| AAC | 5960 | 6524 | 12,484 |
| NHAAC | 5825 | 6421 | 12,246 |
| AA | 4999 | 5533 | 10,532 |
| NHAA | 4953 | 5484 | 10,437 |
| TOM | 3607 | 3872 | 7,479 |
| NHTOM | 3246 | 3621 | 6,867 |
| IAC | 2455 | 2546 | 5,001 |
| NHIAC | 1868 | 2161 | 4,029 |
| HBAC | 1412 | 1217 | 2,629 |
| HBA | 1233 | 1090 | 2,323 |
| IA | 1117 | 1098 | 2,215 |
| NHIA | 695 | 825 | 1,520 |
| HIAC | 587 | 385 | 972 |
| HIA | 422 | 273 | 695 |
| NAC | 346 | 337 | 683 |
| HTOM | 361 | 251 | 612 |
| NA | 212 | 189 | 401 |
| NHNAC | 169 | 201 | 370 |
| HNAC | 177 | 136 | 313 |
| HNA | 147 | 109 | 256 |
| HAAC | 135 | 103 | 238 |
| NHNA | 65 | 80 | 145 |
| HAA | 46 | 49 | 95 |
• Shelby County population
23.7 mi, 
147°
• Tuscaloosa County
40.4 mi, 
243°
• St. Clair County
35.2 mi, 
71°
• Talladega County
43.4 mi, 
107°
• Cullman County
40 mi, 
2°
• Walker County
28.5 mi, 
305°
• Blount County
34.9 mi, 
32°
• Chilton County
49.3 mi, 
168°
• Winston County
49.5 mi, 
327°
• Bibb County
39.5 mi, 
199°
[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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