Last official estimated population of Sumter County was 107,581 (year 2014)[1]. This was 0.034% of total US population and 2.2% of total South Carolina state population. Area of Sumter County is 682.1 mi² (=1766.6 km²), in this year population density was 157.72 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Sumter County population in 2024 would be 107,894 [0].
Historical population of Sumter 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] +11.16 %/yr
[1800-1810] +3.82 %/yr
[1810-1820] +2.9 %/yr
[1820-1830] +1.09 %/yr
[1830-1840] -0.14 %/yr
[1840-1850] +1.76 %/yr
[1850-1860] -3.26 %/yr
[1860-1870] +0.58 %/yr
[1870-1880] +3.9 %/yr
[1880-1890] +1.65 %/yr
[1890-1900] +1.63 %/yr
[1900-1910] -2.82 %/yr
[1910-1920] +1.13 %/yr
[1920-1930] +0.65 %/yr
[1930-1940] +1.34 %/yr
[1940-1950] +0.94 %/yr
[1950-1960] +2.66 %/yr
[1960-1970] +0.58 %/yr
[1970-1980] +1.06 %/yr
[1980-1990] +1.39 %/yr
[1990-2000] +0.33 %/yr
[2000-2005] +0.27 %/yr
[2005-2010] +0.26 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Sumter County? Visit this page: Settlements in Sumter County, SC
Population of Sumter County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3818 | 3794 | 7,612 |
| 5 to 9 | 3772 | 3736 | 7,508 |
| 10 to 14 | 3617 | 3509 | 7,126 |
| 15 to 19 | 3593 | 3450 | 7,043 |
| 20 to 24 | 4957 | 4233 | 9,190 |
| 25 to 29 | 3852 | 3852 | 7,704 |
| 30 to 34 | 3341 | 3458 | 6,799 |
| 35 to 39 | 2925 | 3135 | 6,060 |
| 40 to 44 | 2916 | 3194 | 6,110 |
| 45 to 49 | 3108 | 3500 | 6,608 |
| 50 to 54 | 3500 | 3822 | 7,322 |
| 55 to 59 | 3246 | 3798 | 7,044 |
| 60 to 64 | 2811 | 3330 | 6,141 |
| 65 to 69 | 2298 | 2783 | 5,081 |
| 70 to 74 | 1742 | 2122 | 3,864 |
| 75 to 79 | 1252 | 1747 | 2,999 |
| 80 to 84 | 751 | 1149 | 1,900 |
| 85+ | 565 | 1243 | 1,808 |
Sumter 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 | 49818 | 54023 | 103,841 |
| WAC | 27481 | 27183 | 54,664 |
| WA | 26691 | 26352 | 53,043 |
| BAC | 24055 | 27871 | 51,926 |
| NHWAC | 25740 | 25746 | 51,486 |
| NHBAC | 23649 | 27519 | 51,168 |
| BA | 23544 | 27314 | 50,858 |
| NHBA | 23193 | 27020 | 50,213 |
| NHWA | 25034 | 25000 | 50,034 |
| H | 2246 | 1832 | 4,078 |
| HWAC | 1741 | 1437 | 3,178 |
| HWA | 1657 | 1352 | 3,009 |
| AAC | 867 | 1221 | 2,088 |
| NHAAC | 801 | 1171 | 1,972 |
| TOM | 925 | 988 | 1,913 |
| NHTOM | 828 | 887 | 1,715 |
| AA | 564 | 878 | 1,442 |
| NHAA | 525 | 856 | 1,381 |
| IAC | 544 | 560 | 1,104 |
| NHIAC | 424 | 465 | 889 |
| HBAC | 406 | 352 | 758 |
| HBA | 351 | 294 | 645 |
| IA | 259 | 257 | 516 |
| NHIA | 176 | 205 | 381 |
| NAC | 147 | 118 | 265 |
| NHNAC | 121 | 101 | 222 |
| HIAC | 120 | 95 | 215 |
| HTOM | 97 | 101 | 198 |
| NA | 81 | 66 | 147 |
| HIA | 83 | 52 | 135 |
| NHNA | 62 | 55 | 117 |
| HAAC | 66 | 50 | 116 |
| HAA | 39 | 22 | 61 |
| HNAC | 26 | 17 | 43 |
| HNA | 19 | 11 | 30 |
• Richland County population
30.6 mi, 
284°
• Lexington County
51.1 mi, 
268°
• Florence County
39.3 mi, 
78°
• Orangeburg County
41.1 mi, 
216°
• Darlington County
37.5 mi, 
39°
• Kershaw County
31.5 mi, 
337°
• Clarendon County
19.8 mi, 
151°
• Williamsburg County
43.2 mi, 
117°
• Lee County
18.4 mi, 
24°
• Calhoun County
28.3 mi, 
233°
[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
See note 22 South Carolina Notes
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