Last official estimated population of Simpson County was 27,503 (year 2014)[1]. This was 0.009% of total US population and 0.9% of total Mississippi state population. Area of Simpson County is 590.5 mi² (=1529.3 km²), in this year population density was 46.58 p/mi². If population growth rate would be same as in period 2010-2014 (0%/yr), Simpson County population in 2025 would be 27,503 [0].
Historical population of Simpson 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] +2.35 %/yr
[1840-1850] +3.43 %/yr
[1850-1860] +2.53 %/yr
[1860-1870] -0.61 %/yr
[1870-1880] +3.43 %/yr
[1880-1890] +2.39 %/yr
[1890-1900] +2.36 %/yr
[1900-1910] +3 %/yr
[1910-1920] +0.52 %/yr
[1920-1930] +1.44 %/yr
[1930-1940] +0.53 %/yr
[1940-1950] -0.09 %/yr
[1950-1960] -0.64 %/yr
[1960-1970] -0.25 %/yr
[1970-1980] +1.63 %/yr
[1980-1990] +0.22 %/yr
[1990-2000] +1.44 %/yr
[2000-2005] -0 %/yr
[2005-2010] -0.09 %/yr
[2010-2014] 0 %/yr
Looking for settlements in Simpson County? Visit this page: Settlements in Simpson County, MS
Population of Simpson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 942 | 824 | 1,766 |
| 5 to 9 | 1078 | 968 | 2,046 |
| 10 to 14 | 1010 | 947 | 1,957 |
| 15 to 19 | 970 | 837 | 1,807 |
| 20 to 24 | 890 | 866 | 1,756 |
| 25 to 29 | 788 | 863 | 1,651 |
| 30 to 34 | 812 | 858 | 1,670 |
| 35 to 39 | 786 | 779 | 1,565 |
| 40 to 44 | 794 | 902 | 1,696 |
| 45 to 49 | 781 | 858 | 1,639 |
| 50 to 54 | 871 | 1022 | 1,893 |
| 55 to 59 | 1004 | 1023 | 2,027 |
| 60 to 64 | 811 | 901 | 1,712 |
| 65 to 69 | 670 | 766 | 1,436 |
| 70 to 74 | 446 | 562 | 1,008 |
| 75 to 79 | 343 | 486 | 829 |
| 80 to 84 | 208 | 291 | 499 |
| 85+ | 174 | 332 | 506 |
Simpson 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 | 13122 | 13891 | 27,013 |
| WAC | 8589 | 8798 | 17,387 |
| WA | 8487 | 8695 | 17,182 |
| NHWAC | 8428 | 8669 | 17,097 |
| NHWA | 8328 | 8573 | 16,901 |
| BAC | 4728 | 5228 | 9,956 |
| NHBAC | 4661 | 5178 | 9,839 |
| BA | 4653 | 5157 | 9,810 |
| NHBA | 4590 | 5111 | 9,701 |
| H | 256 | 194 | 450 |
| HWAC | 161 | 129 | 290 |
| HWA | 159 | 122 | 281 |
| TOM | 113 | 123 | 236 |
| NHTOM | 108 | 114 | 222 |
| IAC | 83 | 94 | 177 |
| AAC | 77 | 86 | 163 |
| NHAAC | 76 | 84 | 160 |
| NHIAC | 53 | 71 | 124 |
| HBAC | 67 | 50 | 117 |
| AA | 58 | 59 | 117 |
| NHAA | 57 | 59 | 116 |
| HBA | 63 | 46 | 109 |
| IA | 45 | 40 | 85 |
| HIAC | 30 | 23 | 53 |
| NAC | 28 | 16 | 44 |
| HIA | 27 | 17 | 44 |
| NHNAC | 26 | 15 | 41 |
| NHIA | 18 | 23 | 41 |
| NA | 22 | 11 | 33 |
| NHNA | 21 | 11 | 32 |
| HTOM | 5 | 9 | 14 |
| HNAC | 2 | 1 | 3 |
| HAAC | 1 | 2 | 3 |
| HNA | 1 | 0 | 1 |
| HAA | 1 | 0 | 1 |
• Hinds County population
40.8 mi, 
308°
• Rankin County
25.2 mi, 
356°
• Lincoln County
40.4 mi, 
231°
• Copiah County
31.3 mi, 
265°
• Scott County
42.7 mi, 
31°
• Marion County
46.8 mi, 
173°
• Covington County
28.6 mi, 
130°
• Smith County
26.1 mi, 
72°
• Lawrence County
26.8 mi, 
204°
• Jefferson Davis County
23.9 mi, 167°
[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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