Last official estimated population of Marshall County was 10,105 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Kansas state population. Area of Marshall County is 905.1 mi² (=2344.2 km²), in this year population density was 11.16 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Marshall County population in 2026 would be 10,069 [0].
Historical population of Marshall County for period 1860-2014 [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

[1860-1870] +11.71 %/yr
[1870-1880] +8.87 %/yr
[1880-1890] +4.01 %/yr
[1890-1900] +0.18 %/yr
[1900-1910] -0.2 %/yr
[1910-1920] -0.49 %/yr
[1920-1930] +0.14 %/yr
[1930-1940] -0.94 %/yr
[1940-1950] -1.56 %/yr
[1950-1960] -1.38 %/yr
[1960-1970] -1.7 %/yr
[1970-1980] -0.27 %/yr
[1980-1990] -0.88 %/yr
[1990-2000] -0.65 %/yr
[2000-2005] -1.3 %/yr
[2005-2010] -0.3 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Marshall County? Visit this page: Settlements in Marshall County, KS
Population of Marshall County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 312 | 304 | 616 |
| 5 to 9 | 331 | 340 | 671 |
| 10 to 14 | 327 | 325 | 652 |
| 15 to 19 | 296 | 270 | 566 |
| 20 to 24 | 258 | 224 | 482 |
| 25 to 29 | 247 | 254 | 501 |
| 30 to 34 | 300 | 308 | 608 |
| 35 to 39 | 279 | 241 | 520 |
| 40 to 44 | 252 | 226 | 478 |
| 45 to 49 | 259 | 254 | 513 |
| 50 to 54 | 387 | 385 | 772 |
| 55 to 59 | 431 | 415 | 846 |
| 60 to 64 | 345 | 317 | 662 |
| 65 to 69 | 267 | 255 | 522 |
| 70 to 74 | 209 | 243 | 452 |
| 75 to 79 | 175 | 208 | 383 |
| 80 to 84 | 153 | 199 | 352 |
| 85+ | 161 | 249 | 410 |
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 | 4921 | 4919 | 9,840 |
| NH | 4841 | 4930 | 9,771 |
| WA | 4843 | 4851 | 9,694 |
| NHWAC | 4786 | 4844 | 9,630 |
| NHWA | 4716 | 4778 | 9,494 |
| H | 148 | 87 | 235 |
| HWAC | 135 | 75 | 210 |
| HWA | 127 | 73 | 200 |
| TOM | 85 | 70 | 155 |
| NHTOM | 77 | 68 | 145 |
| IAC | 72 | 64 | 136 |
| NHIAC | 54 | 58 | 112 |
| BAC | 57 | 42 | 99 |
| NHBAC | 56 | 39 | 95 |
| AAC | 24 | 56 | 80 |
| NHAAC | 23 | 53 | 76 |
| AA | 13 | 46 | 59 |
| IA | 27 | 29 | 56 |
| NHAA | 13 | 43 | 56 |
| NHIA | 15 | 24 | 39 |
| BA | 19 | 16 | 35 |
| NHBA | 19 | 15 | 34 |
| HIAC | 18 | 6 | 24 |
| HIA | 12 | 5 | 17 |
| NAC | 6 | 9 | 15 |
| HTOM | 8 | 2 | 10 |
| NHNAC | 4 | 6 | 10 |
| NA | 2 | 5 | 7 |
| HNAC | 2 | 3 | 5 |
| HBAC | 1 | 3 | 4 |
| HAAC | 1 | 3 | 4 |
| HNA | 1 | 3 | 4 |
| NHNA | 1 | 2 | 3 |
| HAA | 0 | 3 | 3 |
| HBA | 0 | 1 | 1 |
• Riley County population
35.7 mi,
197°
• Gage County
33.8 mi,
345°
• Pottawatomie County
29.4 mi,
160°
• Jackson County
46.4 mi,
123°
• Nemaha County
27.4 mi,
88°
• Clay County
45.9 mi,
228°
• Jefferson County
42.7 mi,
309°
• Washington County
30.5 mi,
269°
• Johnson County
44.4 mi,
17°
• Pawnee County
28.6 mi,
30°
[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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