Last official estimated population of Mason County was 17,508 (year 2014)[1]. This was 0.005% of total US population and 0.4% of total Kentucky state population. Area of Mason County is 246.4 mi² (=638.2 km²), in this year population density was 71.05 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Mason County population in 2025 would be 17,558 [0].
Historical population of Mason County for period 1790-2014 [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

[1790-1800] +16.14 %/yr
[1800-1810] +0.23 %/yr
[1810-1820] +0.87 %/yr
[1820-1830] +1.77 %/yr
[1830-1840] -0.3 %/yr
[1840-1850] +1.56 %/yr
[1850-1860] -0.07 %/yr
[1860-1870] -0.05 %/yr
[1870-1880] +1.22 %/yr
[1880-1890] +0.15 %/yr
[1890-1900] -0.16 %/yr
[1900-1910] -0.94 %/yr
[1910-1920] -0.47 %/yr
[1920-1930] +0.6 %/yr
[1930-1940] +0.11 %/yr
[1940-1950] -0.31 %/yr
[1950-1960] -0.02 %/yr
[1960-1970] -0.66 %/yr
[1970-1980] +0.28 %/yr
[1980-1990] -0.64 %/yr
[1990-2000] +0.09 %/yr
[2000-2005] +0.13 %/yr
[2005-2010] +0.66 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Mason County? Visit this page: Settlements in Mason County, KY
Population of Mason County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 584 | 537 | 1,121 |
| 5 to 9 | 582 | 542 | 1,124 |
| 10 to 14 | 529 | 573 | 1,102 |
| 15 to 19 | 597 | 489 | 1,086 |
| 20 to 24 | 522 | 501 | 1,023 |
| 25 to 29 | 468 | 484 | 952 |
| 30 to 34 | 448 | 477 | 925 |
| 35 to 39 | 456 | 503 | 959 |
| 40 to 44 | 536 | 560 | 1,096 |
| 45 to 49 | 596 | 611 | 1,207 |
| 50 to 54 | 619 | 618 | 1,237 |
| 55 to 59 | 577 | 692 | 1,269 |
| 60 to 64 | 580 | 599 | 1,179 |
| 65 to 69 | 445 | 514 | 959 |
| 70 to 74 | 315 | 411 | 726 |
| 75 to 79 | 213 | 275 | 488 |
| 80 to 84 | 142 | 230 | 372 |
| 85+ | 107 | 234 | 341 |
Mason 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 | 8192 | 8719 | 16,911 |
| WAC | 7677 | 8199 | 15,876 |
| NHWAC | 7566 | 8088 | 15,654 |
| WA | 7532 | 8032 | 15,564 |
| NHWA | 7433 | 7929 | 15,362 |
| BAC | 666 | 663 | 1,329 |
| NHBAC | 653 | 651 | 1,304 |
| BA | 574 | 553 | 1,127 |
| NHBA | 567 | 544 | 1,111 |
| TOM | 145 | 171 | 316 |
| NHTOM | 133 | 162 | 295 |
| H | 124 | 131 | 255 |
| HWAC | 111 | 111 | 222 |
| HWA | 99 | 103 | 202 |
| IAC | 68 | 80 | 148 |
| AAC | 57 | 82 | 139 |
| NHAAC | 56 | 78 | 134 |
| NHIAC | 55 | 64 | 119 |
| AA | 44 | 66 | 110 |
| NHAA | 43 | 65 | 108 |
| IA | 21 | 26 | 47 |
| NHIA | 16 | 17 | 33 |
| HIAC | 13 | 16 | 29 |
| HBAC | 13 | 12 | 25 |
| HTOM | 12 | 9 | 21 |
| HBA | 7 | 9 | 16 |
| HIA | 5 | 9 | 14 |
| HAAC | 1 | 4 | 5 |
| NAC | 0 | 4 | 4 |
| NHNAC | 0 | 4 | 4 |
| HAA | 1 | 1 | 2 |
| NA | 0 | 2 | 2 |
| NHNA | 0 | 2 | 2 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Brown County population
23.4 mi,
354°
• Adams County
25.1 mi,
48°
• Harrison County
29.2 mi,
249°
• Pendleton County
29.1 mi,
284°
• Fleming County
16.9 mi,
157°
• Lewis County
24.5 mi,
96°
• Bath County
30.9 mi,
170°
• Bracken County
16.6 mi,
291°
• Nicholas County
20.7 mi,
211°
• Robertson County
13.9 mi,
246°
[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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