Last official estimated population of Union County was 27,153 (year 2014)[1]. This was 0.009% of total US population and 0.9% of total Mississippi state population. Area of Union County is 416.9 mi² (=1079.8 km²), in this year population density was 65.13 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Union County population in 2025 would be 27,205 [0].
Historical population of Union County for period 1880-2014 [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

[1880-1890] +1.82 %/yr
[1890-1900] +0.57 %/yr
[1900-1910] +1.41 %/yr
[1910-1920] +0.54 %/yr
[1920-1930] +0.59 %/yr
[1930-1940] +0.28 %/yr
[1940-1950] -0.76 %/yr
[1950-1960] -0.69 %/yr
[1960-1970] +0.1 %/yr
[1970-1980] +1.31 %/yr
[1980-1990] +0.16 %/yr
[1990-2000] +1.39 %/yr
[2000-2005] +0.95 %/yr
[2005-2010] +0.42 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Union County? Visit this page: Settlements in Union County, MS
Population of Union County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 909 | 961 | 1,870 |
| 5 to 9 | 986 | 1004 | 1,990 |
| 10 to 14 | 1014 | 1006 | 2,020 |
| 15 to 19 | 967 | 874 | 1,841 |
| 20 to 24 | 904 | 874 | 1,778 |
| 25 to 29 | 905 | 905 | 1,810 |
| 30 to 34 | 856 | 829 | 1,685 |
| 35 to 39 | 919 | 913 | 1,832 |
| 40 to 44 | 876 | 970 | 1,846 |
| 45 to 49 | 946 | 923 | 1,869 |
| 50 to 54 | 897 | 945 | 1,842 |
| 55 to 59 | 875 | 883 | 1,758 |
| 60 to 64 | 737 | 817 | 1,554 |
| 65 to 69 | 712 | 763 | 1,475 |
| 70 to 74 | 484 | 574 | 1,058 |
| 75 to 79 | 349 | 459 | 808 |
| 80 to 84 | 218 | 313 | 531 |
| 85+ | 165 | 365 | 530 |
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 | 13014 | 13792 | 26,806 |
| WAC | 11583 | 12035 | 23,618 |
| WA | 11406 | 11854 | 23,260 |
| NHWAC | 10938 | 11503 | 22,441 |
| NHWA | 10791 | 11352 | 22,143 |
| BAC | 2145 | 2368 | 4,513 |
| NHBAC | 2098 | 2330 | 4,428 |
| BA | 2017 | 2236 | 4,253 |
| NHBA | 1992 | 2214 | 4,206 |
| H | 705 | 586 | 1,291 |
| HWAC | 645 | 532 | 1,177 |
| HWA | 615 | 502 | 1,117 |
| TOM | 201 | 202 | 403 |
| NHTOM | 167 | 169 | 336 |
| IAC | 116 | 110 | 226 |
| AAC | 76 | 79 | 155 |
| NHIAC | 78 | 69 | 147 |
| NHAAC | 69 | 69 | 138 |
| HBAC | 47 | 38 | 85 |
| AA | 40 | 41 | 81 |
| NHAA | 40 | 41 | 81 |
| IA | 40 | 40 | 80 |
| HIAC | 38 | 41 | 79 |
| HTOM | 34 | 33 | 67 |
| HBA | 25 | 22 | 47 |
| HIA | 19 | 25 | 44 |
| NAC | 25 | 13 | 38 |
| NHIA | 21 | 15 | 36 |
| HNAC | 16 | 6 | 22 |
| NA | 15 | 5 | 20 |
| HAAC | 7 | 10 | 17 |
| HNA | 12 | 4 | 16 |
| NHNAC | 9 | 7 | 16 |
| NHNA | 3 | 1 | 4 |
| HAA | 0 | 0 | 0 |
• Lee County population
22.8 mi,
126°
• Lafayette County
29.2 mi,
250°
• Alcorn County
36.4 mi,
41°
• Marshall County
34.3 mi,
303°
• Pontotoc County
18.2 mi,
186°
• Prentiss County
28.8 mi,
71°
• Itawamba County
39.2 mi,
111°
• Tippah County
19.5 mi,
14°
• Chickasaw County
39.4 mi,
175°
• Benton County
24.9 mi,
333°
[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
*Tippah, Pontotoc, Lee Mississippi Notes
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