Last official estimated population of Watonwan County was 11,213 (year 2014)[1]. This was 0.004% of total US population and 0.2% of total Minnesota state population. Area of Watonwan County is 439.7 mi² (=1138.9 km²), in this year population density was 25.50 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), Watonwan County population in 2026 would be 11,219 [0].
Historical population of Watonwan County for period 1870-2014 [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

[1870-1880] +7.72 %/yr
[1880-1890] +4.26 %/yr
[1890-1900] +4.03 %/yr
[1900-1910] -0.1 %/yr
[1910-1920] +0.91 %/yr
[1920-1930] +0.27 %/yr
[1930-1940] +0.83 %/yr
[1940-1950] -0.02 %/yr
[1950-1960] +0.41 %/yr
[1960-1970] -0.83 %/yr
[1970-1980] -0.73 %/yr
[1980-1990] -0.56 %/yr
[1990-2000] +0.17 %/yr
[2000-2005] -0.86 %/yr
[2005-2010] -0.29 %/yr
[2010-2014] +0 %/yr
Looking for settlements in Watonwan County? Visit this page: Settlements in Watonwan County, MN
Population of Watonwan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 396 | 363 | 759 |
| 5 to 9 | 358 | 375 | 733 |
| 10 to 14 | 407 | 377 | 784 |
| 15 to 19 | 342 | 378 | 720 |
| 20 to 24 | 323 | 302 | 625 |
| 25 to 29 | 289 | 243 | 532 |
| 30 to 34 | 338 | 314 | 652 |
| 35 to 39 | 326 | 313 | 639 |
| 40 to 44 | 284 | 285 | 569 |
| 45 to 49 | 308 | 335 | 643 |
| 50 to 54 | 368 | 362 | 730 |
| 55 to 59 | 425 | 427 | 852 |
| 60 to 64 | 394 | 325 | 719 |
| 65 to 69 | 255 | 264 | 519 |
| 70 to 74 | 235 | 241 | 476 |
| 75 to 79 | 172 | 218 | 390 |
| 80 to 84 | 140 | 182 | 322 |
| 85+ | 153 | 266 | 419 |
Watonwan 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 |
| WAC | 5294 | 5307 | 10,601 |
| WA | 5249 | 5258 | 10,507 |
| NH | 4243 | 4299 | 8,542 |
| NHWAC | 4140 | 4169 | 8,309 |
| NHWA | 4113 | 4139 | 8,252 |
| H | 1270 | 1271 | 2,541 |
| HWAC | 1154 | 1138 | 2,292 |
| HWA | 1136 | 1119 | 2,255 |
| BAC | 106 | 138 | 244 |
| BA | 78 | 112 | 190 |
| IAC | 97 | 83 | 180 |
| AAC | 62 | 95 | 157 |
| IA | 79 | 62 | 141 |
| AA | 54 | 79 | 133 |
| HBAC | 48 | 84 | 132 |
| HIAC | 75 | 55 | 130 |
| NHAAC | 50 | 79 | 129 |
| NHAA | 44 | 71 | 115 |
| HIA | 67 | 46 | 113 |
| NHBAC | 58 | 54 | 112 |
| HBA | 38 | 74 | 112 |
| TOM | 48 | 56 | 104 |
| NHBA | 40 | 38 | 78 |
| NHTOM | 30 | 33 | 63 |
| NHIAC | 22 | 28 | 50 |
| HTOM | 18 | 23 | 41 |
| NHIA | 12 | 16 | 28 |
| HAAC | 12 | 16 | 28 |
| HAA | 10 | 8 | 18 |
| NAC | 6 | 4 | 10 |
| NA | 5 | 3 | 8 |
| NHNAC | 4 | 3 | 7 |
| NHNA | 4 | 2 | 6 |
| HNAC | 2 | 1 | 3 |
| HNA | 1 | 1 | 2 |
• Blue Earth County population
27.6 mi,
82°
• Nicollet County
32 mi,
34°
• Brown County
19.5 mi,
342°
• Martin County
21.2 mi,
169°
• Redwood County
43.2 mi,
312°
• Sibley County
45.4 mi,
24°
• Faribault County
39.2 mi,
122°
• Cottonwood County
28.4 mi,
274°
• Emmet County
41.6 mi,
183°
• Jackson County
34.1 mi,
231°
[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
*Brown Minnesota Notes
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