Last official estimated population of Monroe County was 138,520 (year 2014)[1]. This was 0.043% of total US population and 2.1% of total Indiana state population. Area of Monroe County is 411.3 mi² (=1065.3 km²), in this year population density was 336.77 p/mi². If population growth rate would be same as in period 2010-2014 (+0.1%/yr), Monroe County population in 2025 would be 140,033 [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] +9.4 %/yr
[1830-1840] +4.43 %/yr
[1840-1850] +1.07 %/yr
[1850-1860] +1.3 %/yr
[1860-1870] +0.98 %/yr
[1870-1880] +1.14 %/yr
[1880-1890] +1.08 %/yr
[1890-1900] +1.68 %/yr
[1900-1910] +1.16 %/yr
[1910-1920] +0.46 %/yr
[1920-1930] +3.91 %/yr
[1930-1940] +0.15 %/yr
[1940-1950] +3.2 %/yr
[1950-1960] +1.69 %/yr
[1960-1970] +3.66 %/yr
[1970-1980] +1.53 %/yr
[1980-1990] +0.99 %/yr
[1990-2000] +1.02 %/yr
[2000-2005] +1.22 %/yr
[2005-2010] +1.49 %/yr
[2010-2014] +0.1 %/yr
Looking for settlements in Monroe County? Visit this page: Settlements in Monroe County, IN
Population of Monroe County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3362 | 3116 | 6,478 |
| 5 to 9 | 3386 | 3034 | 6,420 |
| 10 to 14 | 3216 | 3100 | 6,316 |
| 15 to 19 | 7532 | 7573 | 15,105 |
| 20 to 24 | 14380 | 14230 | 28,610 |
| 25 to 29 | 6366 | 5459 | 11,825 |
| 30 to 34 | 4777 | 4484 | 9,261 |
| 35 to 39 | 3843 | 3625 | 7,468 |
| 40 to 44 | 3467 | 3371 | 6,838 |
| 45 to 49 | 3396 | 3564 | 6,960 |
| 50 to 54 | 3635 | 3697 | 7,332 |
| 55 to 59 | 3610 | 3941 | 7,551 |
| 60 to 64 | 3299 | 3565 | 6,864 |
| 65 to 69 | 2557 | 2866 | 5,423 |
| 70 to 74 | 1784 | 2015 | 3,799 |
| 75 to 79 | 1129 | 1525 | 2,654 |
| 80 to 84 | 880 | 1224 | 2,104 |
| 85+ | 766 | 1565 | 2,331 |
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 | 68970 | 69600 | 138,570 |
| WAC | 63780 | 64664 | 128,444 |
| WA | 62166 | 62996 | 125,162 |
| NHWAC | 61602 | 62550 | 124,152 |
| NHWA | 60139 | 61001 | 121,140 |
| AAC | 5457 | 5154 | 10,611 |
| NHAAC | 5362 | 5091 | 10,453 |
| AA | 4756 | 4453 | 9,209 |
| NHAA | 4704 | 4428 | 9,132 |
| BAC | 3219 | 3235 | 6,454 |
| NHBAC | 3055 | 3045 | 6,100 |
| BA | 2514 | 2472 | 4,986 |
| H | 2415 | 2354 | 4,769 |
| NHBA | 2420 | 2339 | 4,759 |
| HWAC | 2178 | 2114 | 4,292 |
| HWA | 2027 | 1995 | 4,022 |
| TOM | 1691 | 1745 | 3,436 |
| NHTOM | 1531 | 1614 | 3,145 |
| IAC | 649 | 676 | 1,325 |
| NHIAC | 495 | 542 | 1,037 |
| IA | 202 | 250 | 452 |
| HBAC | 164 | 190 | 354 |
| NHIA | 136 | 186 | 322 |
| HTOM | 160 | 131 | 291 |
| HIAC | 154 | 134 | 288 |
| NAC | 132 | 123 | 255 |
| HBA | 94 | 133 | 227 |
| NHNAC | 102 | 108 | 210 |
| HAAC | 95 | 63 | 158 |
| HIA | 66 | 64 | 130 |
| NA | 56 | 38 | 94 |
| HAA | 52 | 25 | 77 |
| NHNA | 40 | 32 | 72 |
| HNAC | 30 | 15 | 45 |
| HNA | 16 | 6 | 22 |
• Johnson County population
32.6 mi, 
44°
• Bartholomew County
33.6 mi, 
84°
• Morgan County
22.6 mi, 
10°
• Lawrence County
22.3 mi, 
175°
• Jackson County
31 mi, 
123°
• Greene County
27 mi, 
253°
• Clay County
35.5 mi, 
296°
• Owen County
20.1 mi, 302°
• Brown County
15.4 mi, 81°
• Martin County
34.8 mi, 
205°
[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
*Knox Indiana Notes
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