Last official estimated population of Williamson County was 184,068 (year 2014)[1]. This was 0.058% of total US population and 2.8% of total Tennessee state population. Area of Williamson County is 583.8 mi² (=1512 km²), in this year population density was 315.31 p/mi². If population growth rate would be same as in period 2010-2014 (+0.12%/yr), Williamson County population in 2026 would be 186,752 [0].
Historical population of Williamson County for period 1800-2014 [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
[1800-1810] +16.45 %/yr
[1810-1820] +4.61 %/yr
[1820-1830] +2.58 %/yr
[1830-1840] +0.14 %/yr
[1840-1850] +0.07 %/yr
[1850-1860] -1.32 %/yr
[1860-1870] +0.61 %/yr
[1870-1880] +1.12 %/yr
[1880-1890] -0.73 %/yr
[1890-1900] +0.04 %/yr
[1900-1910] -0.87 %/yr
[1910-1920] -0.34 %/yr
[1920-1930] -0.24 %/yr
[1930-1940] +0.99 %/yr
[1940-1950] -0.37 %/yr
[1950-1960] +0.39 %/yr
[1960-1970] +3.11 %/yr
[1970-1980] +5.4 %/yr
[1980-1990] +3.38 %/yr
[1990-2000] +4.57 %/yr
[2000-2005] +4 %/yr
[2005-2010] +3.52 %/yr
[2010-2014] +0.12 %/yr
Looking for settlements in Williamson County? Visit this page: Settlements in Williamson County, TN
Population of Williamson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 5994 | 5859 | 11,853 |
| 5 to 9 | 8332 | 8057 | 16,389 |
| 10 to 14 | 9380 | 9106 | 18,486 |
| 15 to 19 | 8124 | 7659 | 15,783 |
| 20 to 24 | 5227 | 4941 | 10,168 |
| 25 to 29 | 3997 | 4139 | 8,136 |
| 30 to 34 | 5074 | 5887 | 10,961 |
| 35 to 39 | 6630 | 7342 | 13,972 |
| 40 to 44 | 8033 | 8580 | 16,613 |
| 45 to 49 | 7987 | 8468 | 16,455 |
| 50 to 54 | 7877 | 8456 | 16,333 |
| 55 to 59 | 7178 | 7531 | 14,709 |
| 60 to 64 | 5620 | 5920 | 11,540 |
| 65 to 69 | 4441 | 4586 | 9,027 |
| 70 to 74 | 2640 | 2921 | 5,561 |
| 75 to 79 | 1656 | 2114 | 3,770 |
| 80 to 84 | 1041 | 1591 | 2,632 |
| 85+ | 906 | 1932 | 2,838 |
Williamson 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 | 95264 | 100223 | 195,487 |
| WAC | 91632 | 95924 | 187,556 |
| WA | 90282 | 94456 | 184,738 |
| NHWAC | 87011 | 91356 | 178,367 |
| NHWA | 85771 | 89999 | 175,770 |
| BAC | 4955 | 5369 | 10,324 |
| NHBAC | 4796 | 5189 | 9,985 |
| H | 4873 | 4866 | 9,739 |
| BA | 4442 | 4789 | 9,231 |
| HWAC | 4621 | 4568 | 9,189 |
| NHBA | 4336 | 4655 | 8,991 |
| HWA | 4511 | 4457 | 8,968 |
| AAC | 4264 | 4624 | 8,888 |
| NHAAC | 4193 | 4553 | 8,746 |
| AA | 3669 | 3978 | 7,647 |
| NHAA | 3632 | 3936 | 7,568 |
| TOM | 1410 | 1553 | 2,963 |
| NHTOM | 1290 | 1430 | 2,720 |
| IAC | 663 | 705 | 1,368 |
| NHIAC | 529 | 554 | 1,083 |
| IA | 271 | 251 | 522 |
| NHIA | 190 | 158 | 348 |
| HBAC | 159 | 180 | 339 |
| HIAC | 134 | 151 | 285 |
| NAC | 124 | 124 | 248 |
| HTOM | 120 | 123 | 243 |
| HBA | 106 | 134 | 240 |
| NHNAC | 99 | 95 | 194 |
| HIA | 81 | 93 | 174 |
| HAAC | 71 | 71 | 142 |
| NA | 63 | 62 | 125 |
| NHNA | 45 | 45 | 90 |
| HAA | 37 | 42 | 79 |
| HNAC | 25 | 29 | 54 |
| HNA | 18 | 17 | 35 |
• Davidson County population
20 mi, 
18°
• Rutherford County
27.1 mi, 
97°
• Wilson County
38.2 mi, 
62°
• Maury County
21.8 mi, 
207°
• Dickson County
31.3 mi, 
303°
• Bedford County
36.1 mi, 
136°
• Cheatham County
27.4 mi, 
335°
• Marshall County
30.4 mi, 
165°
• Hickman County
32.5 mi, 
258°
• Lewis County
42.3 mi, 
232°
[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
*Davidson Tennessee Notes
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