Last official estimated population of Shelby County was 12,168 (year 2014)[1]. This was 0.004% of total US population and 0.4% of total Iowa state population. Area of Shelby County is 591.4 mi² (=1531.6 km²), in this year population density was 20.58 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), Shelby County population in 2026 would be 12,171 [0].
Historical population of Shelby 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] +12 %/yr
[1870-1880] +17.46 %/yr
[1880-1890] +3.33 %/yr
[1890-1900] +0.18 %/yr
[1900-1910] -0.8 %/yr
[1910-1920] -0.3 %/yr
[1920-1930] +0.64 %/yr
[1930-1940] -0.24 %/yr
[1940-1950] -0.48 %/yr
[1950-1960] -0.07 %/yr
[1960-1970] -0.19 %/yr
[1970-1980] -0.32 %/yr
[1980-1990] -1.28 %/yr
[1990-2000] -0.13 %/yr
[2000-2005] -0.8 %/yr
[2005-2010] -0.61 %/yr
[2010-2014] +0 %/yr
Looking for settlements in Shelby County? Visit this page: Settlements in Shelby County, IA
Population of Shelby County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 338 | 333 | 671 |
| 5 to 9 | 368 | 339 | 707 |
| 10 to 14 | 445 | 398 | 843 |
| 15 to 19 | 391 | 376 | 767 |
| 20 to 24 | 297 | 298 | 595 |
| 25 to 29 | 233 | 243 | 476 |
| 30 to 34 | 271 | 249 | 520 |
| 35 to 39 | 262 | 316 | 578 |
| 40 to 44 | 334 | 297 | 631 |
| 45 to 49 | 365 | 381 | 746 |
| 50 to 54 | 485 | 508 | 993 |
| 55 to 59 | 509 | 443 | 952 |
| 60 to 64 | 393 | 399 | 792 |
| 65 to 69 | 342 | 363 | 705 |
| 70 to 74 | 261 | 267 | 528 |
| 75 to 79 | 224 | 264 | 488 |
| 80 to 84 | 162 | 252 | 414 |
| 85+ | 201 | 341 | 542 |
Shelby 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 | 5783 | 5986 | 11,769 |
| WA | 5733 | 5944 | 11,677 |
| NH | 5739 | 5931 | 11,670 |
| NHWAC | 5653 | 5860 | 11,513 |
| NHWA | 5608 | 5818 | 11,426 |
| H | 142 | 136 | 278 |
| HWAC | 130 | 126 | 256 |
| HWA | 125 | 126 | 251 |
| TOM | 53 | 45 | 98 |
| BAC | 60 | 35 | 95 |
| NHTOM | 48 | 45 | 93 |
| IAC | 46 | 47 | 93 |
| NHBAC | 58 | 33 | 91 |
| NHIAC | 38 | 41 | 79 |
| AAC | 37 | 41 | 78 |
| NHAAC | 36 | 41 | 77 |
| BA | 40 | 22 | 62 |
| NHBA | 39 | 20 | 59 |
| NHAA | 25 | 27 | 52 |
| AA | 25 | 27 | 52 |
| IA | 24 | 25 | 49 |
| NHIA | 19 | 19 | 38 |
| NAC | 10 | 6 | 16 |
| HIAC | 8 | 6 | 14 |
| HIA | 5 | 6 | 11 |
| NA | 6 | 4 | 10 |
| HNAC | 6 | 2 | 8 |
| HNA | 6 | 2 | 8 |
| NHNAC | 4 | 4 | 8 |
| HTOM | 5 | 0 | 5 |
| HBAC | 2 | 2 | 4 |
| HBA | 1 | 2 | 3 |
| NHNA | 0 | 2 | 2 |
| HAAC | 1 | 0 | 1 |
| HAA | 0 | 0 | 0 |
• Pottawattamie County population
26.4 mi, 
207°
• Carroll County
33.7 mi, 
42°
• Crawford County
25.5 mi, 
350°
• Mills County
47.4 mi, 
199°
• Harrison County
26.7 mi, 
271°
• Cass County
30.8 mi, 
140°
• Guthrie County
41.7 mi, 
89°
• Montgomery County
46.1 mi, 
170°
• Monona County
42 mi, 
307°
• Audubon County
20.9 mi, 89°
[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
*Pottawattamie Iowa Notes
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