Last official estimated population of Monroe County was 14,583 (year 2014)[1]. This was 0.005% of total US population and 0.1% of total Ohio state population. Area of Monroe County is 457.5 mi² (=1184.8 km²), in this year population density was 31.88 p/mi². If population growth rate would be same as in period 2010-2014 (-0.1%/yr), Monroe County population in 2024 would be 14,437 [0].
Historical population of Monroe County for period 1820-2014 [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
[1820-1830] +6.56 %/yr
[1830-1840] +7.76 %/yr
[1840-1850] +4.35 %/yr
[1850-1860] -0.96 %/yr
[1860-1870] +0.01 %/yr
[1870-1880] +0.27 %/yr
[1880-1890] -0.51 %/yr
[1890-1900] +0.71 %/yr
[1900-1910] -1.08 %/yr
[1910-1920] -1.59 %/yr
[1920-1930] -1.14 %/yr
[1930-1940] +0.12 %/yr
[1940-1950] -1.92 %/yr
[1950-1960] -0.06 %/yr
[1960-1970] +0.3 %/yr
[1970-1980] +1 %/yr
[1980-1990] -1.14 %/yr
[1990-2000] -0.21 %/yr
[2000-2005] -0.3 %/yr
[2005-2010] -0.41 %/yr
[2010-2014] -0.1 %/yr
Looking for settlements in Monroe County? Visit this page: Settlements in Monroe County, OH
Population of Monroe County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 427 | 348 | 775 |
| 5 to 9 | 413 | 415 | 828 |
| 10 to 14 | 453 | 435 | 888 |
| 15 to 19 | 445 | 390 | 835 |
| 20 to 24 | 358 | 356 | 714 |
| 25 to 29 | 343 | 342 | 685 |
| 30 to 34 | 382 | 359 | 741 |
| 35 to 39 | 386 | 382 | 768 |
| 40 to 44 | 423 | 447 | 870 |
| 45 to 49 | 507 | 433 | 940 |
| 50 to 54 | 543 | 525 | 1,068 |
| 55 to 59 | 556 | 544 | 1,100 |
| 60 to 64 | 547 | 565 | 1,112 |
| 65 to 69 | 481 | 506 | 987 |
| 70 to 74 | 416 | 408 | 824 |
| 75 to 79 | 307 | 282 | 589 |
| 80 to 84 | 164 | 220 | 384 |
| 85+ | 131 | 226 | 357 |
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 | 7251 | 7148 | 14,399 |
| WAC | 7221 | 7112 | 14,333 |
| NHWAC | 7194 | 7082 | 14,276 |
| WA | 7142 | 7021 | 14,163 |
| NHWA | 7115 | 6992 | 14,107 |
| TOM | 83 | 94 | 177 |
| NHTOM | 83 | 93 | 176 |
| BAC | 69 | 66 | 135 |
| NHBAC | 67 | 66 | 133 |
| IAC | 57 | 73 | 130 |
| NHIAC | 56 | 70 | 126 |
| BA | 43 | 36 | 79 |
| NHBA | 41 | 36 | 77 |
| H | 31 | 35 | 66 |
| HWAC | 27 | 30 | 57 |
| HWA | 27 | 29 | 56 |
| AAC | 17 | 26 | 43 |
| NHAAC | 17 | 23 | 40 |
| IA | 10 | 13 | 23 |
| AA | 3 | 18 | 21 |
| NHIA | 9 | 11 | 20 |
| NHAA | 3 | 15 | 18 |
| NAC | 3 | 3 | 6 |
| NHNAC | 2 | 3 | 5 |
| HIAC | 1 | 3 | 4 |
| HIA | 1 | 2 | 3 |
| HAAC | 0 | 3 | 3 |
| HAA | 0 | 3 | 3 |
| HBAC | 2 | 0 | 2 |
| HBA | 2 | 0 | 2 |
| NA | 1 | 1 | 2 |
| HNAC | 1 | 0 | 1 |
| HNA | 1 | 0 | 1 |
| NHNA | 0 | 1 | 1 |
| HTOM | 0 | 1 | 1 |
• Belmont County population
21.2 mi, 
17°
• Washington County
28.6 mi, 
228°
• Ohio County
35.8 mi, 
44°
• Guernsey County
31.4 mi, 
316°
• Marshall County
24 mi, 
68°
• Wetzel County
26.1 mi, 
109°
• Noble County
19.4 mi, 
278°
• Ritchie County
38 mi, 
178°
• Tyler County
21.3 mi, 
147°
• Pleasants County
25 mi, 
188°
[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
See note 13 Ohio Notes
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