Last official estimated population of Monroe County was 151,911 (year 2014)[1]. This was 0.048% of total US population and 1.5% of total Michigan state population. Area of Monroe County is 680.0 mi² (=1761.2 km²), in this year population density was 223.39 p/mi². If population growth rate would be same as in period 2010-2014 (-0.02%/yr), Monroe County population in 2026 would be 151,581 [0].
Historical population of Monroe County for period 1810-2014 [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
[1810-1820] +3.17 %/yr
[1820-1830] +5.7 %/yr
[1830-1840] +12.03 %/yr
[1840-1850] +4.01 %/yr
[1850-1860] +3.92 %/yr
[1860-1870] +2.44 %/yr
[1870-1880] +2.04 %/yr
[1880-1890] -0.39 %/yr
[1890-1900] +0.13 %/yr
[1900-1910] +0.05 %/yr
[1910-1920] +1.21 %/yr
[1920-1930] +3.53 %/yr
[1930-1940] +1.11 %/yr
[1940-1950] +2.59 %/yr
[1950-1960] +2.94 %/yr
[1960-1970] +1.6 %/yr
[1970-1980] +1.29 %/yr
[1980-1990] -0.08 %/yr
[1990-2000] +0.89 %/yr
[2000-2005] +0.87 %/yr
[2005-2010] -0.05 %/yr
[2010-2014] -0.02 %/yr
Looking for settlements in Monroe County? Visit this page: Settlements in Monroe County, MI
Population of Monroe County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 4069 | 3966 | 8,035 |
| 5 to 9 | 4503 | 4389 | 8,892 |
| 10 to 14 | 5130 | 4998 | 10,128 |
| 15 to 19 | 5141 | 4833 | 9,974 |
| 20 to 24 | 4679 | 4486 | 9,165 |
| 25 to 29 | 4221 | 3999 | 8,220 |
| 30 to 34 | 4128 | 4189 | 8,317 |
| 35 to 39 | 4174 | 4337 | 8,511 |
| 40 to 44 | 4758 | 4857 | 9,615 |
| 45 to 49 | 5302 | 5405 | 10,707 |
| 50 to 54 | 6120 | 6116 | 12,236 |
| 55 to 59 | 6089 | 6075 | 12,164 |
| 60 to 64 | 5164 | 5116 | 10,280 |
| 65 to 69 | 3907 | 4035 | 7,942 |
| 70 to 74 | 2721 | 3013 | 5,734 |
| 75 to 79 | 1726 | 2253 | 3,979 |
| 80 to 84 | 1153 | 1713 | 2,866 |
| 85+ | 988 | 2071 | 3,059 |
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 | 71408 | 73335 | 144,743 |
| WAC | 71321 | 73233 | 144,554 |
| WA | 70075 | 72008 | 142,083 |
| NHWAC | 68958 | 70894 | 139,852 |
| NHWA | 67822 | 69772 | 137,594 |
| H | 2565 | 2516 | 5,081 |
| BAC | 2476 | 2342 | 4,818 |
| HWAC | 2363 | 2339 | 4,702 |
| NHBAC | 2316 | 2202 | 4,518 |
| HWA | 2253 | 2236 | 4,489 |
| BA | 1853 | 1728 | 3,581 |
| NHBA | 1746 | 1634 | 3,380 |
| TOM | 1300 | 1281 | 2,581 |
| NHTOM | 1177 | 1170 | 2,347 |
| IAC | 806 | 813 | 1,619 |
| AAC | 651 | 727 | 1,378 |
| NHAAC | 640 | 708 | 1,348 |
| NHIAC | 660 | 683 | 1,343 |
| AA | 450 | 540 | 990 |
| NHAA | 448 | 531 | 979 |
| IA | 276 | 277 | 553 |
| NHIA | 202 | 213 | 415 |
| HBAC | 160 | 140 | 300 |
| HIAC | 146 | 130 | 276 |
| HTOM | 123 | 111 | 234 |
| HBA | 107 | 94 | 201 |
| HIA | 74 | 64 | 138 |
| NAC | 55 | 58 | 113 |
| NHNAC | 44 | 53 | 97 |
| NA | 19 | 17 | 36 |
| HAAC | 11 | 19 | 30 |
| NHNA | 13 | 15 | 28 |
| HNAC | 11 | 5 | 16 |
| HAA | 2 | 9 | 11 |
| HNA | 6 | 2 | 8 |
• Wayne County population
28 mi, 
24°
• Oakland County
51.7 mi, 
5°
• Lucas County
16.2 mi, 
176°
• Washtenaw County
29.6 mi, 
321°
• Wood County
39 mi, 
190°
• Lenawee County
30.2 mi, 
267°
• Sandusky County
42.6 mi, 
155°
• Fulton County
39.5 mi, 
236°
• Ottawa County
35.4 mi, 
136°
• Henry County
50.3 mi, 
216°
[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 6 Michigan Notes
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