Last official estimated population of Sullivan County was 6,717 (year 2014)[1]. This was 0.002% of total US population and 0.1% of total Missouri state population. Area of Sullivan County is 651.5 mi² (=1687.4 km²), in this year population density was 10.31 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Sullivan County population in 2026 would be 6,726 [0].
Historical population of Sullivan County for period 1850-2014 [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
[1850-1860] +11.92 %/yr
[1860-1870] +2.62 %/yr
[1870-1880] +3.36 %/yr
[1880-1890] +1.38 %/yr
[1890-1900] +0.66 %/yr
[1900-1910] -0.86 %/yr
[1910-1920] -0.45 %/yr
[1920-1930] -1.55 %/yr
[1930-1940] -1.04 %/yr
[1940-1950] -1.91 %/yr
[1950-1960] -2.49 %/yr
[1960-1970] -1.47 %/yr
[1970-1980] -0.18 %/yr
[1980-1990] -1.6 %/yr
[1990-2000] +1.34 %/yr
[2000-2005] -1.1 %/yr
[2005-2010] -0.37 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Sullivan County? Visit this page: Settlements in Sullivan County, MO
Population of Sullivan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 206 | 178 | 384 |
| 5 to 9 | 217 | 177 | 394 |
| 10 to 14 | 215 | 211 | 426 |
| 15 to 19 | 211 | 216 | 427 |
| 20 to 24 | 201 | 158 | 359 |
| 25 to 29 | 151 | 164 | 315 |
| 30 to 34 | 172 | 171 | 343 |
| 35 to 39 | 201 | 175 | 376 |
| 40 to 44 | 214 | 184 | 398 |
| 45 to 49 | 194 | 231 | 425 |
| 50 to 54 | 271 | 223 | 494 |
| 55 to 59 | 264 | 196 | 460 |
| 60 to 64 | 205 | 224 | 429 |
| 65 to 69 | 192 | 178 | 370 |
| 70 to 74 | 131 | 160 | 291 |
| 75 to 79 | 104 | 115 | 219 |
| 80 to 84 | 70 | 90 | 160 |
| 85+ | 37 | 104 | 141 |
Sullivan 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 |
| WAC | 3141 | 3070 | 6,211 |
| WA | 3120 | 3036 | 6,156 |
| NH | 2624 | 2657 | 5,281 |
| NHWAC | 2540 | 2609 | 5,149 |
| NHWA | 2520 | 2578 | 5,098 |
| H | 632 | 498 | 1,130 |
| HWAC | 601 | 461 | 1,062 |
| HWA | 600 | 458 | 1,058 |
| BAC | 76 | 53 | 129 |
| BA | 70 | 37 | 107 |
| NHBAC | 63 | 41 | 104 |
| NHBA | 58 | 28 | 86 |
| IAC | 35 | 45 | 80 |
| NHIAC | 30 | 31 | 61 |
| TOM | 22 | 35 | 57 |
| NHTOM | 21 | 32 | 53 |
| IA | 22 | 25 | 47 |
| AAC | 18 | 12 | 30 |
| NHIA | 17 | 11 | 28 |
| AA | 14 | 11 | 25 |
| HBAC | 13 | 12 | 25 |
| HBA | 12 | 9 | 21 |
| NHAAC | 12 | 8 | 20 |
| NAC | 9 | 11 | 20 |
| NA | 8 | 11 | 19 |
| HIA | 5 | 14 | 19 |
| HIAC | 5 | 14 | 19 |
| HNAC | 8 | 10 | 18 |
| HNA | 8 | 10 | 18 |
| NHAA | 8 | 7 | 15 |
| HAAC | 6 | 4 | 10 |
| HAA | 6 | 4 | 10 |
| HTOM | 1 | 3 | 4 |
| NHNAC | 1 | 1 | 2 |
| NHNA | 0 | 1 | 1 |
• Adair County population
26.7 mi, 
92°
• Macon County
39 mi, 
132°
• Livingston County
37.8 mi, 
217°
• Appanoose County
39 mi, 
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• Linn County
23.8 mi, 
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• Grundy County
25 mi, 
254°
• Wayne County
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• Putnam County
19.3 mi, 15°
• Schuyler County
35.9 mi, 
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• Mercer County
28.2 mi, 
301°
[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
*Linn Missouri Notes
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