Last official estimated population of Monroe County was 8,795 (year 2014)[1]. This was 0.003% of total US population and 0.1% of total Missouri state population. Area of Monroe County is 670.2 mi² (=1735.7 km²), in this year population density was 13.12 p/mi². If population growth rate would be same as in period 2010-2014 (-0.13%/yr), Monroe County population in 2026 would be 8,661 [0].
Historical population of Monroe County for period 1840-2014 [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
[1840-1850] +1.04 %/yr
[1850-1860] +3.44 %/yr
[1860-1870] +1.49 %/yr
[1870-1880] +1.07 %/yr
[1880-1890] +0.87 %/yr
[1890-1900] -0.53 %/yr
[1900-1910] -0.74 %/yr
[1910-1920] -1.08 %/yr
[1920-1930] -1.96 %/yr
[1930-1940] -0.2 %/yr
[1940-1950] -1.53 %/yr
[1950-1960] -0.57 %/yr
[1960-1970] -1.13 %/yr
[1970-1980] +0.18 %/yr
[1980-1990] -0.65 %/yr
[1990-2000] +0.23 %/yr
[2000-2005] -0.24 %/yr
[2005-2010] -0.81 %/yr
[2010-2014] -0.13 %/yr
Looking for settlements in Monroe County? Visit this page: Settlements in Monroe County, MO
Population of Monroe County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 246 | 207 | 453 |
| 5 to 9 | 306 | 257 | 563 |
| 10 to 14 | 310 | 294 | 604 |
| 15 to 19 | 278 | 256 | 534 |
| 20 to 24 | 235 | 230 | 465 |
| 25 to 29 | 211 | 196 | 407 |
| 30 to 34 | 250 | 220 | 470 |
| 35 to 39 | 225 | 205 | 430 |
| 40 to 44 | 247 | 221 | 468 |
| 45 to 49 | 248 | 253 | 501 |
| 50 to 54 | 346 | 337 | 683 |
| 55 to 59 | 346 | 347 | 693 |
| 60 to 64 | 318 | 309 | 627 |
| 65 to 69 | 281 | 293 | 574 |
| 70 to 74 | 240 | 222 | 462 |
| 75 to 79 | 151 | 174 | 325 |
| 80 to 84 | 94 | 108 | 202 |
| 85+ | 75 | 171 | 246 |
Monroe 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 | 4356 | 4245 | 8,601 |
| WAC | 4243 | 4141 | 8,384 |
| NHWAC | 4198 | 4091 | 8,289 |
| WA | 4173 | 4072 | 8,245 |
| NHWA | 4128 | 4022 | 8,150 |
| BAC | 169 | 153 | 322 |
| NHBAC | 168 | 151 | 319 |
| BA | 125 | 116 | 241 |
| NHBA | 124 | 114 | 238 |
| TOM | 73 | 69 | 142 |
| NHTOM | 73 | 69 | 142 |
| H | 51 | 55 | 106 |
| HWA | 45 | 50 | 95 |
| HWAC | 45 | 50 | 95 |
| IAC | 46 | 40 | 86 |
| NHIAC | 41 | 38 | 79 |
| AAC | 22 | 29 | 51 |
| NHAAC | 22 | 28 | 50 |
| IA | 25 | 16 | 41 |
| AA | 10 | 26 | 36 |
| NHAA | 10 | 25 | 35 |
| NHIA | 20 | 14 | 34 |
| NHNAC | 3 | 6 | 9 |
| NAC | 3 | 6 | 9 |
| HIAC | 5 | 2 | 7 |
| HIA | 5 | 2 | 7 |
| HBAC | 1 | 2 | 3 |
| HBA | 1 | 2 | 3 |
| NA | 1 | 1 | 2 |
| NHNA | 1 | 1 | 2 |
| HAAC | 0 | 1 | 1 |
| HAA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| HTOM | 0 | 0 | 0 |
• Boone County population
38.7 mi, 
204°
• Marion County
29.1 mi, 
42°
• Audrain County
21.5 mi, 
156°
• Randolph County
26.3 mi, 
261°
• Macon County
37.5 mi, 
307°
• Lewis County
43.1 mi, 
19°
• Ralls County
26 mi, 
81°
• Howard County
44.3 mi, 
236°
• Shelby County
21.1 mi, 
348°
• Knox County
44.7 mi, 350°
[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
*Ralls Missouri Notes
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