Last official estimated population of Buena Vista County was 20,328 (year 2014)[1]. This was 0.006% of total US population and 0.7% of total Iowa state population. Area of Buena Vista County is 580.2 mi² (=1502.8 km²), in this year population density was 35.03 p/mi². If population growth rate would be same as in period 2010-2014 (+0.08%/yr), Buena Vista County population in 2025 would be 20,516 [0].
Historical population of Buena Vista 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] +39.45 %/yr
[1870-1880] +16.87 %/yr
[1880-1890] +6.04 %/yr
[1890-1900] +2.28 %/yr
[1900-1910] -0.6 %/yr
[1910-1920] +1.51 %/yr
[1920-1930] +0.06 %/yr
[1930-1940] +0.61 %/yr
[1940-1950] +0.62 %/yr
[1950-1960] +0.04 %/yr
[1960-1970] -0.24 %/yr
[1970-1980] +0.04 %/yr
[1980-1990] -0.4 %/yr
[1990-2000] +0.22 %/yr
[2000-2005] -0.44 %/yr
[2005-2010] +0.29 %/yr
[2010-2014] +0.08 %/yr
Looking for settlements in Buena Vista County? Visit this page: Settlements in Buena Vista County, IA
Population of Buena Vista County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 727 | 772 | 1,499 |
| 5 to 9 | 764 | 723 | 1,487 |
| 10 to 14 | 731 | 672 | 1,403 |
| 15 to 19 | 790 | 749 | 1,539 |
| 20 to 24 | 998 | 849 | 1,847 |
| 25 to 29 | 689 | 572 | 1,261 |
| 30 to 34 | 652 | 575 | 1,227 |
| 35 to 39 | 556 | 505 | 1,061 |
| 40 to 44 | 549 | 519 | 1,068 |
| 45 to 49 | 579 | 586 | 1,165 |
| 50 to 54 | 676 | 678 | 1,354 |
| 55 to 59 | 753 | 680 | 1,433 |
| 60 to 64 | 642 | 581 | 1,223 |
| 65 to 69 | 420 | 384 | 804 |
| 70 to 74 | 276 | 307 | 583 |
| 75 to 79 | 207 | 271 | 478 |
| 80 to 84 | 191 | 292 | 483 |
| 85+ | 210 | 453 | 663 |
Buena Vista 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 | 8934 | 8974 | 17,908 |
| WA | 8820 | 8861 | 17,681 |
| NH | 7726 | 7742 | 15,468 |
| NHWAC | 6388 | 6673 | 13,061 |
| NHWA | 6304 | 6582 | 12,886 |
| H | 2684 | 2426 | 5,110 |
| HWAC | 2546 | 2301 | 4,847 |
| HWA | 2516 | 2279 | 4,795 |
| AAC | 1011 | 814 | 1,825 |
| NHAAC | 982 | 787 | 1,769 |
| AA | 966 | 768 | 1,734 |
| NHAA | 944 | 746 | 1,690 |
| BAC | 390 | 324 | 714 |
| BA | 337 | 267 | 604 |
| NHBAC | 334 | 270 | 604 |
| NHBA | 292 | 222 | 514 |
| TOM | 125 | 125 | 250 |
| NAC | 109 | 96 | 205 |
| IAC | 103 | 97 | 200 |
| NHTOM | 93 | 101 | 194 |
| NA | 100 | 91 | 191 |
| NHNAC | 92 | 80 | 172 |
| NHNA | 83 | 77 | 160 |
| HIAC | 72 | 55 | 127 |
| IA | 62 | 56 | 118 |
| HBAC | 56 | 54 | 110 |
| HIA | 52 | 42 | 94 |
| HBA | 45 | 45 | 90 |
| NHIAC | 31 | 42 | 73 |
| HTOM | 32 | 24 | 56 |
| HAAC | 29 | 27 | 56 |
| HAA | 22 | 22 | 44 |
| HNAC | 17 | 16 | 33 |
| HNA | 17 | 14 | 31 |
| NHIA | 10 | 14 | 24 |
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[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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