Last official estimated population of Monona County was 9,240 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Iowa state population. Area of Monona County is 698.9 mi² (=1810.2 km²), in this year population density was 13.22 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Monona County population in 2026 would be 9,231 [0].
Historical population of Monona 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] +15.95 %/yr
[1870-1880] +9.5 %/yr
[1880-1890] +4.83 %/yr
[1890-1900] +2.16 %/yr
[1900-1910] -0.78 %/yr
[1910-1920] +0.29 %/yr
[1920-1930] +0.62 %/yr
[1930-1940] +0.01 %/yr
[1940-1950] -1.12 %/yr
[1950-1960] -1.57 %/yr
[1960-1970] -1.41 %/yr
[1970-1980] -0.32 %/yr
[1980-1990] -1.52 %/yr
[1990-2000] -0.01 %/yr
[2000-2005] -0.92 %/yr
[2005-2010] -0.68 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Monona County? Visit this page: Settlements in Monona County, IA
Population of Monona County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 229 | 228 | 457 |
| 5 to 9 | 285 | 245 | 530 |
| 10 to 14 | 289 | 273 | 562 |
| 15 to 19 | 304 | 267 | 571 |
| 20 to 24 | 243 | 201 | 444 |
| 25 to 29 | 184 | 163 | 347 |
| 30 to 34 | 219 | 224 | 443 |
| 35 to 39 | 209 | 218 | 427 |
| 40 to 44 | 232 | 225 | 457 |
| 45 to 49 | 233 | 250 | 483 |
| 50 to 54 | 345 | 339 | 684 |
| 55 to 59 | 373 | 366 | 739 |
| 60 to 64 | 337 | 306 | 643 |
| 65 to 69 | 274 | 265 | 539 |
| 70 to 74 | 248 | 272 | 520 |
| 75 to 79 | 186 | 227 | 413 |
| 80 to 84 | 131 | 197 | 328 |
| 85+ | 119 | 290 | 409 |
Monona 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 | 4347 | 4472 | 8,819 |
| WAC | 4352 | 4462 | 8,814 |
| WA | 4309 | 4420 | 8,729 |
| NHWAC | 4259 | 4388 | 8,647 |
| NHWA | 4218 | 4348 | 8,566 |
| H | 93 | 84 | 177 |
| HWAC | 93 | 74 | 167 |
| HWA | 91 | 72 | 163 |
| IAC | 65 | 74 | 139 |
| NHIAC | 64 | 63 | 127 |
| IA | 46 | 57 | 103 |
| NHIA | 46 | 48 | 94 |
| TOM | 44 | 43 | 87 |
| NHTOM | 42 | 40 | 82 |
| BAC | 51 | 26 | 77 |
| NHBAC | 50 | 25 | 75 |
| AAC | 16 | 28 | 44 |
| NHAAC | 16 | 27 | 43 |
| NHBA | 29 | 12 | 41 |
| BA | 29 | 12 | 41 |
| AA | 10 | 19 | 29 |
| NHAA | 10 | 19 | 29 |
| NAC | 3 | 9 | 12 |
| NHNAC | 3 | 9 | 12 |
| HIAC | 1 | 11 | 12 |
| HIA | 0 | 9 | 9 |
| NA | 2 | 5 | 7 |
| NHNA | 2 | 5 | 7 |
| HTOM | 2 | 3 | 5 |
| HBAC | 1 | 1 | 2 |
| HAAC | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HBA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Woodbury County population
24.3 mi, 
348°
• Dakota County
38.9 mi, 
307°
• Washington County
38.2 mi, 
201°
• Crawford County
29.1 mi, 
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• Harrison County
25.8 mi, 
165°
• Shelby County
42 mi, 
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• Cuming County
43.7 mi, 
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• Ida County
33 mi, 
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• Thurston County
30.5 mi, 
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• Burt County
23.8 mi, 
235°
[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
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