Last official estimated population of Maries County was 9,176 (year 2014)[1]. This was 0.003% of total US population and 0.2% of total Missouri state population. Area of Maries County is 529.9 mi² (=1372.5 km²), in this year population density was 17.32 p/mi². If population growth rate would be same as in period 2010-2014 (0%/yr), Maries County population in 2026 would be 9,176 [0].
Historical population of Maries 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] +1.9 %/yr
[1870-1880] +2.13 %/yr
[1880-1890] +1.65 %/yr
[1890-1900] +1.12 %/yr
[1900-1910] +0.48 %/yr
[1910-1920] -0.6 %/yr
[1920-1930] -1.26 %/yr
[1930-1940] +0.32 %/yr
[1940-1950] -1.5 %/yr
[1950-1960] -0.19 %/yr
[1960-1970] -0.61 %/yr
[1970-1980] +0.98 %/yr
[1980-1990] +0.55 %/yr
[1990-2000] +1.13 %/yr
[2000-2005] +0.55 %/yr
[2005-2010] +0.01 %/yr
[2010-2014] 0 %/yr
Looking for settlements in Maries County? Visit this page: Settlements in Maries County, MO
Population of Maries County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 236 | 183 | 419 |
| 5 to 9 | 297 | 271 | 568 |
| 10 to 14 | 297 | 300 | 597 |
| 15 to 19 | 302 | 279 | 581 |
| 20 to 24 | 241 | 214 | 455 |
| 25 to 29 | 199 | 247 | 446 |
| 30 to 34 | 244 | 258 | 502 |
| 35 to 39 | 265 | 219 | 484 |
| 40 to 44 | 265 | 250 | 515 |
| 45 to 49 | 278 | 320 | 598 |
| 50 to 54 | 400 | 377 | 777 |
| 55 to 59 | 363 | 340 | 703 |
| 60 to 64 | 323 | 302 | 625 |
| 65 to 69 | 256 | 270 | 526 |
| 70 to 74 | 223 | 240 | 463 |
| 75 to 79 | 151 | 175 | 326 |
| 80 to 84 | 116 | 122 | 238 |
| 85+ | 81 | 109 | 190 |
Maries 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 | 4486 | 4427 | 8,913 |
| WAC | 4476 | 4397 | 8,873 |
| NHWAC | 4428 | 4350 | 8,778 |
| WA | 4423 | 4342 | 8,765 |
| NHWA | 4376 | 4297 | 8,673 |
| IAC | 58 | 70 | 128 |
| NHIAC | 56 | 67 | 123 |
| TOM | 56 | 59 | 115 |
| NHTOM | 55 | 57 | 112 |
| H | 51 | 49 | 100 |
| HWAC | 48 | 47 | 95 |
| HWA | 47 | 45 | 92 |
| BAC | 43 | 35 | 78 |
| NHBAC | 40 | 34 | 74 |
| IA | 26 | 31 | 57 |
| NHIA | 25 | 30 | 55 |
| NHAAC | 15 | 30 | 45 |
| AAC | 15 | 30 | 45 |
| BA | 25 | 19 | 44 |
| NHBA | 23 | 18 | 41 |
| AA | 6 | 25 | 31 |
| NHAA | 6 | 25 | 31 |
| NHNAC | 4 | 5 | 9 |
| NAC | 4 | 5 | 9 |
| HIAC | 2 | 3 | 5 |
| HBAC | 3 | 1 | 4 |
| HBA | 2 | 1 | 3 |
| HTOM | 1 | 2 | 3 |
| HIA | 1 | 1 | 2 |
| NA | 1 | 0 | 1 |
| NHNA | 1 | 0 | 1 |
| HNAC | 0 | 0 | 0 |
| HAAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Cole County population
30.4 mi,
320°
• Pulaski County
28 mi,
213°
• Phelps County
21.7 mi,
160°
• Callaway County
46.5 mi,
0°
• Camden County
46.7 mi,
258°
• Miller County
27.7 mi,
277°
• Crawford County
35.8 mi,
112°
• Dent County
45.3 mi,
148°
• Gasconade County
29.7 mi,
49°
• Osage County
21.1 mi,
9°
[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
*Osage, Pulaski, Crawford Missouri Notes
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