Last official estimated population of Marshall County was 31,458 (year 2014)[1]. This was 0.01% of total US population and 0.7% of total Kentucky state population. Area of Marshall County is 340.2 mi² (=881 km²), in this year population density was 92.48 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Marshall County population in 2025 would be 31,486 [0].
Historical population of Marshall 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] +2.85 %/yr
[1860-1870] +3.08 %/yr
[1870-1880] +0.2 %/yr
[1880-1890] +1.58 %/yr
[1890-1900] +1.95 %/yr
[1900-1910] +1.42 %/yr
[1910-1920] -0.36 %/yr
[1920-1930] -1.65 %/yr
[1930-1940] +2.56 %/yr
[1940-1950] -2.13 %/yr
[1950-1960] +2.26 %/yr
[1960-1970] +1.99 %/yr
[1970-1980] +2.32 %/yr
[1980-1990] +0.6 %/yr
[1990-2000] +1.03 %/yr
[2000-2005] +0.49 %/yr
[2005-2010] +0.37 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Marshall County? Visit this page: Settlements in Marshall County, KY
Population of Marshall County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 799 | 785 | 1,584 |
| 5 to 9 | 882 | 832 | 1,714 |
| 10 to 14 | 937 | 895 | 1,832 |
| 15 to 19 | 857 | 830 | 1,687 |
| 20 to 24 | 832 | 831 | 1,663 |
| 25 to 29 | 764 | 776 | 1,540 |
| 30 to 34 | 819 | 893 | 1,712 |
| 35 to 39 | 906 | 835 | 1,741 |
| 40 to 44 | 934 | 1001 | 1,935 |
| 45 to 49 | 1042 | 1051 | 2,093 |
| 50 to 54 | 1165 | 1214 | 2,379 |
| 55 to 59 | 1130 | 1208 | 2,338 |
| 60 to 64 | 1102 | 1108 | 2,210 |
| 65 to 69 | 1010 | 1100 | 2,110 |
| 70 to 74 | 813 | 886 | 1,699 |
| 75 to 79 | 531 | 666 | 1,197 |
| 80 to 84 | 379 | 422 | 801 |
| 85+ | 241 | 477 | 718 |
Marshall 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 | 15000 | 15648 | 30,648 |
| NH | 14936 | 15590 | 30,526 |
| WA | 14875 | 15496 | 30,371 |
| NHWAC | 14801 | 15437 | 30,238 |
| NHWA | 14680 | 15294 | 29,974 |
| H | 207 | 220 | 427 |
| HWAC | 199 | 211 | 410 |
| HWA | 195 | 202 | 397 |
| TOM | 130 | 158 | 288 |
| NHTOM | 125 | 149 | 274 |
| IAC | 102 | 120 | 222 |
| NHIAC | 96 | 110 | 206 |
| BAC | 104 | 98 | 202 |
| NHBAC | 101 | 96 | 197 |
| AAC | 68 | 101 | 169 |
| NHAAC | 66 | 93 | 159 |
| AA | 46 | 72 | 118 |
| BA | 61 | 50 | 111 |
| NHBA | 61 | 50 | 111 |
| NHAA | 45 | 66 | 111 |
| IA | 30 | 30 | 60 |
| NHIA | 25 | 27 | 52 |
| NAC | 8 | 11 | 19 |
| HIAC | 6 | 10 | 16 |
| NHNAC | 5 | 11 | 16 |
| HTOM | 5 | 9 | 14 |
| HAAC | 2 | 8 | 10 |
| HIA | 5 | 3 | 8 |
| HAA | 1 | 6 | 7 |
| HBAC | 3 | 2 | 5 |
| NA | 1 | 4 | 5 |
| NHNA | 0 | 4 | 4 |
| HNAC | 3 | 0 | 3 |
| HNA | 1 | 0 | 1 |
| HBA | 0 | 0 | 0 |
• McCracken County population
24.1 mi,
299°
• Calloway County
18.3 mi,
169°
• Graves County
20.7 mi,
238°
• Massac County
30.9 mi,
318°
• Trigg County
26.7 mi,
101°
• Caldwell County
31.5 mi,
54°
• Livingston County
22.7 mi,
355°
• Crittenden County
35.2 mi,
20°
• Lyon County
16.9 mi,
54°
• Carlisle County
35.6 mi,
267°
[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
*Calloway Kentucky Notes
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