Last official estimated population of Marshall County was 15,844 (year 2014)[1]. This was 0.005% of total US population and 0.4% of total Oklahoma state population. Area of Marshall County is 426.8 mi² (=1105.5 km²), in this year population density was 37.12 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Marshall County population in 2026 would be 15,856 [0].
Historical population of Marshall County for period 1880-2014 [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
[1880-1890] NAN %/yr
[1890-1900] +INF %/yr
[1900-1910] -1.23 %/yr
[1910-1920] +2.36 %/yr
[1920-1930] -2.82 %/yr
[1930-1940] +1.17 %/yr
[1940-1950] -4.07 %/yr
[1950-1960] -1.18 %/yr
[1960-1970] +0.56 %/yr
[1970-1980] +3.22 %/yr
[1980-1990] +0.26 %/yr
[1990-2000] +1.95 %/yr
[2000-2005] +2.26 %/yr
[2005-2010] +1.52 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Marshall County? Visit this page: Settlements in Marshall County, OK
Population of Marshall County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 521 | 522 | 1,043 |
| 5 to 9 | 595 | 537 | 1,132 |
| 10 to 14 | 568 | 493 | 1,061 |
| 15 to 19 | 530 | 456 | 986 |
| 20 to 24 | 435 | 418 | 853 |
| 25 to 29 | 387 | 410 | 797 |
| 30 to 34 | 420 | 423 | 843 |
| 35 to 39 | 405 | 443 | 848 |
| 40 to 44 | 440 | 481 | 921 |
| 45 to 49 | 491 | 447 | 938 |
| 50 to 54 | 577 | 615 | 1,192 |
| 55 to 59 | 589 | 586 | 1,175 |
| 60 to 64 | 472 | 562 | 1,034 |
| 65 to 69 | 524 | 520 | 1,044 |
| 70 to 74 | 471 | 459 | 930 |
| 75 to 79 | 321 | 325 | 646 |
| 80 to 84 | 196 | 227 | 423 |
| 85+ | 98 | 218 | 316 |
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 | 6996 | 7066 | 14,062 |
| NH | 6687 | 6877 | 13,564 |
| WA | 6512 | 6620 | 13,132 |
| NHWAC | 5753 | 5909 | 11,662 |
| NHWA | 5310 | 5499 | 10,809 |
| H | 1353 | 1265 | 2,618 |
| IAC | 1264 | 1275 | 2,539 |
| HWAC | 1243 | 1157 | 2,400 |
| NHIAC | 1153 | 1172 | 2,325 |
| HWA | 1202 | 1121 | 2,323 |
| IA | 838 | 882 | 1,720 |
| NHIA | 760 | 809 | 1,569 |
| TOM | 505 | 462 | 967 |
| NHTOM | 460 | 420 | 880 |
| BAC | 226 | 207 | 433 |
| NHBAC | 192 | 168 | 360 |
| BA | 148 | 148 | 296 |
| NHBA | 126 | 122 | 248 |
| HIAC | 111 | 103 | 214 |
| HIA | 78 | 73 | 151 |
| AAC | 53 | 52 | 105 |
| NHAAC | 49 | 46 | 95 |
| HTOM | 45 | 42 | 87 |
| HBAC | 34 | 39 | 73 |
| AA | 31 | 28 | 59 |
| NHAA | 30 | 27 | 57 |
| HBA | 22 | 26 | 48 |
| NAC | 14 | 6 | 20 |
| NHNAC | 7 | 4 | 11 |
| HAAC | 4 | 6 | 10 |
| HNAC | 7 | 2 | 9 |
| NA | 6 | 2 | 8 |
| HNA | 5 | 2 | 7 |
| HAA | 1 | 1 | 2 |
| NHNA | 1 | 0 | 1 |
• Grayson County population
28.3 mi, 
168°
• Carter County
33.4 mi, 
297°
• Bryan County
29.3 mi, 
98°
• Cooke County
36.8 mi, 
223°
• Pontotoc County
48.2 mi, 
5°
• Fannin County
48.6 mi, 
128°
• Murray County
36.1 mi, 
331°
• Johnston County
20.9 mi, 
18°
• Love County
27.6 mi, 
260°
• Coal County
47.3 mi, 
35°
[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
*Chickasaw Nation Oklahoma Notes
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