Last official estimated population of Union County was 15,293 (year 2014)[1]. This was 0.005% of total US population and 0.3% of total Kentucky state population. Area of Union County is 363.4 mi² (=941.1 km²), in this year population density was 42.09 p/mi². If population growth rate would be same as in period 2010-2014 (+0.47%/yr), Union County population in 2025 would be 16,108 [0].
Historical population of Union County for period 1820-2014 [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
[1820-1830] +3.22 %/yr
[1830-1840] +3.43 %/yr
[1840-1850] +3.05 %/yr
[1850-1860] +3.56 %/yr
[1860-1870] +0.64 %/yr
[1870-1880] +2.7 %/yr
[1880-1890] +0.23 %/yr
[1890-1900] +1.58 %/yr
[1900-1910] -0.7 %/yr
[1910-1920] -0.97 %/yr
[1920-1930] -0.56 %/yr
[1930-1940] +0.21 %/yr
[1940-1950] -1.55 %/yr
[1950-1960] -0.24 %/yr
[1960-1970] +0.89 %/yr
[1970-1980] +1.16 %/yr
[1980-1990] -0.73 %/yr
[1990-2000] -0.69 %/yr
[2000-2005] -0.15 %/yr
[2005-2010] -0.43 %/yr
[2010-2014] +0.47 %/yr
Looking for settlements in Union County? Visit this page: Settlements in Union County, KY
Population of Union County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 405 | 396 | 801 |
| 5 to 9 | 410 | 397 | 807 |
| 10 to 14 | 410 | 445 | 855 |
| 15 to 19 | 901 | 508 | 1,409 |
| 20 to 24 | 1128 | 565 | 1,693 |
| 25 to 29 | 444 | 370 | 814 |
| 30 to 34 | 402 | 445 | 847 |
| 35 to 39 | 439 | 430 | 869 |
| 40 to 44 | 418 | 430 | 848 |
| 45 to 49 | 422 | 463 | 885 |
| 50 to 54 | 482 | 502 | 984 |
| 55 to 59 | 496 | 573 | 1,069 |
| 60 to 64 | 511 | 491 | 1,002 |
| 65 to 69 | 405 | 404 | 809 |
| 70 to 74 | 233 | 281 | 514 |
| 75 to 79 | 186 | 226 | 412 |
| 80 to 84 | 112 | 195 | 307 |
| 85+ | 70 | 170 | 240 |
Union 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 | 7700 | 7195 | 14,895 |
| WAC | 6497 | 6528 | 13,025 |
| WA | 6373 | 6412 | 12,785 |
| NHWAC | 6340 | 6438 | 12,778 |
| NHWA | 6220 | 6325 | 12,545 |
| BAC | 1381 | 767 | 2,148 |
| NHBAC | 1367 | 763 | 2,130 |
| BA | 1297 | 697 | 1,994 |
| NHBA | 1283 | 694 | 1,977 |
| H | 174 | 96 | 270 |
| HWAC | 157 | 90 | 247 |
| TOM | 125 | 119 | 244 |
| HWA | 153 | 87 | 240 |
| NHTOM | 121 | 116 | 237 |
| AAC | 68 | 56 | 124 |
| NHAAC | 67 | 55 | 122 |
| IAC | 47 | 59 | 106 |
| AA | 58 | 43 | 101 |
| NHAA | 58 | 42 | 100 |
| NHIAC | 41 | 55 | 96 |
| IA | 13 | 19 | 32 |
| NHIA | 10 | 17 | 27 |
| HBAC | 14 | 4 | 18 |
| HBA | 14 | 3 | 17 |
| NAC | 9 | 2 | 11 |
| NHNAC | 9 | 2 | 11 |
| HIAC | 6 | 4 | 10 |
| NA | 8 | 1 | 9 |
| NHNA | 8 | 1 | 9 |
| HTOM | 4 | 3 | 7 |
| HIA | 3 | 2 | 5 |
| HAAC | 1 | 1 | 2 |
| HAA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Vanderburgh County population
32 mi, 
38°
• Hopkins County
32.8 mi, 
136°
• Henderson County
22.7 mi, 
65°
• Posey County
25.9 mi, 
10°
• Saline County
33.1 mi, 
281°
• White County
32.1 mi, 
337°
• Webster County
17.5 mi, 
123°
• Crittenden County
22.4 mi, 
202°
• Gallatin County
16.9 mi, 
296°
• Hardin County
19.8 mi, 
240°
[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
*Henderson Kentucky Notes
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