Last official estimated population of Floyd County was 16,318 (year 2014)[1]. This was 0.005% of total US population and 0.5% of total Iowa state population. Area of Floyd County is 501.4 mi² (=1298.6 km²), in this year population density was 32.55 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Floyd County population in 2026 would be 16,363 [0].
Historical population of Floyd 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] +11.14 %/yr
[1870-1880] +3.15 %/yr
[1880-1890] +0.5 %/yr
[1890-1900] +1.42 %/yr
[1900-1910] -0.36 %/yr
[1910-1920] +0.97 %/yr
[1920-1930] +0.35 %/yr
[1930-1940] +0.33 %/yr
[1940-1950] +0.64 %/yr
[1950-1960] -0.19 %/yr
[1960-1970] -0.6 %/yr
[1970-1980] -0.13 %/yr
[1980-1990] -1.38 %/yr
[1990-2000] -0.09 %/yr
[2000-2005] -0.45 %/yr
[2005-2010] -0.26 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Floyd County? Visit this page: Settlements in Floyd County, IA
Population of Floyd County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 454 | 462 | 916 |
| 5 to 9 | 529 | 533 | 1,062 |
| 10 to 14 | 555 | 546 | 1,101 |
| 15 to 19 | 509 | 501 | 1,010 |
| 20 to 24 | 477 | 452 | 929 |
| 25 to 29 | 388 | 405 | 793 |
| 30 to 34 | 438 | 385 | 823 |
| 35 to 39 | 407 | 418 | 825 |
| 40 to 44 | 455 | 459 | 914 |
| 45 to 49 | 476 | 492 | 968 |
| 50 to 54 | 589 | 578 | 1,167 |
| 55 to 59 | 568 | 557 | 1,125 |
| 60 to 64 | 542 | 573 | 1,115 |
| 65 to 69 | 447 | 478 | 925 |
| 70 to 74 | 393 | 388 | 781 |
| 75 to 79 | 276 | 328 | 604 |
| 80 to 84 | 176 | 264 | 440 |
| 85+ | 220 | 359 | 579 |
Floyd 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 | 7716 | 7989 | 15,705 |
| WAC | 7581 | 7833 | 15,414 |
| WA | 7516 | 7760 | 15,276 |
| NHWAC | 7426 | 7664 | 15,090 |
| NHWA | 7365 | 7597 | 14,962 |
| BAC | 188 | 223 | 411 |
| NHBAC | 181 | 218 | 399 |
| H | 183 | 189 | 372 |
| BA | 149 | 179 | 328 |
| HWAC | 155 | 169 | 324 |
| NHBA | 145 | 177 | 322 |
| HWA | 151 | 163 | 314 |
| AAC | 149 | 148 | 297 |
| NHAAC | 141 | 140 | 281 |
| AA | 135 | 132 | 267 |
| NHAA | 127 | 125 | 252 |
| TOM | 66 | 78 | 144 |
| NHTOM | 62 | 72 | 134 |
| IAC | 43 | 48 | 91 |
| NHIAC | 27 | 34 | 61 |
| IA | 27 | 25 | 52 |
| HIAC | 16 | 14 | 30 |
| HIA | 15 | 11 | 26 |
| NHIA | 12 | 14 | 26 |
| HAAC | 8 | 8 | 16 |
| HAA | 8 | 7 | 15 |
| NAC | 7 | 6 | 13 |
| HBAC | 7 | 5 | 12 |
| NHNAC | 6 | 6 | 12 |
| NA | 6 | 4 | 10 |
| HTOM | 4 | 6 | 10 |
| NHNA | 5 | 4 | 9 |
| HBA | 4 | 2 | 6 |
| HNAC | 1 | 0 | 1 |
| HNA | 1 | 0 | 1 |
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42.4 mi, 
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29.9 mi, 
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• Chickasaw County
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32.1 mi, 
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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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