Last official estimated population of Tama County was 17,723 (year 2014)[1]. This was 0.006% of total US population and 0.6% of total Iowa state population. Area of Tama County is 722.1 mi² (=1870.2 km²), in this year population density was 24.54 p/mi². If population growth rate would be same as in period 2010-2014 (-0.06%/yr), Tama County population in 2024 would be 17,613 [0].
Historical population of Tama County for period 1850-2014 [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
[1850-1860] +91.42 %/yr
[1860-1870] +11.81 %/yr
[1870-1880] +2.96 %/yr
[1880-1890] +0.21 %/yr
[1890-1900] +1.09 %/yr
[1900-1910] -1.03 %/yr
[1910-1920] -0.13 %/yr
[1920-1930] +0.06 %/yr
[1930-1940] +0.2 %/yr
[1940-1950] -0.33 %/yr
[1950-1960] -0.13 %/yr
[1960-1970] -0.61 %/yr
[1970-1980] -0.31 %/yr
[1980-1990] -1.14 %/yr
[1990-2000] +0.38 %/yr
[2000-2005] +0.11 %/yr
[2005-2010] -0.48 %/yr
[2010-2014] -0.06 %/yr
Looking for settlements in Tama County? Visit this page: Settlements in Tama County, IA
Population of Tama County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 477 | 563 | 1,040 |
| 5 to 9 | 536 | 596 | 1,132 |
| 10 to 14 | 674 | 588 | 1,262 |
| 15 to 19 | 615 | 592 | 1,207 |
| 20 to 24 | 475 | 461 | 936 |
| 25 to 29 | 400 | 396 | 796 |
| 30 to 34 | 454 | 452 | 906 |
| 35 to 39 | 461 | 476 | 937 |
| 40 to 44 | 495 | 480 | 975 |
| 45 to 49 | 571 | 573 | 1,144 |
| 50 to 54 | 608 | 637 | 1,245 |
| 55 to 59 | 695 | 670 | 1,365 |
| 60 to 64 | 594 | 568 | 1,162 |
| 65 to 69 | 468 | 464 | 932 |
| 70 to 74 | 351 | 382 | 733 |
| 75 to 79 | 291 | 330 | 621 |
| 80 to 84 | 214 | 273 | 487 |
| 85+ | 184 | 387 | 571 |
Tama 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 | 7794 | 8198 | 15,992 |
| WAC | 7791 | 8055 | 15,846 |
| WA | 7584 | 7824 | 15,408 |
| NHWAC | 7202 | 7528 | 14,730 |
| NHWA | 7073 | 7365 | 14,438 |
| IAC | 833 | 872 | 1,705 |
| H | 769 | 690 | 1,459 |
| IA | 679 | 714 | 1,393 |
| NHIAC | 608 | 673 | 1,281 |
| HWAC | 589 | 527 | 1,116 |
| NHIA | 519 | 573 | 1,092 |
| HWA | 511 | 459 | 970 |
| TOM | 217 | 239 | 456 |
| HIAC | 225 | 199 | 424 |
| NHTOM | 134 | 168 | 302 |
| HIA | 160 | 141 | 301 |
| BAC | 107 | 109 | 216 |
| NHBAC | 79 | 90 | 169 |
| HTOM | 83 | 71 | 154 |
| AAC | 56 | 88 | 144 |
| NHAAC | 45 | 82 | 127 |
| BA | 51 | 45 | 96 |
| NHBA | 46 | 40 | 86 |
| AA | 21 | 51 | 72 |
| NHAA | 19 | 51 | 70 |
| HBAC | 28 | 19 | 47 |
| NAC | 15 | 21 | 36 |
| HNAC | 11 | 16 | 27 |
| NA | 11 | 15 | 26 |
| HNA | 8 | 14 | 22 |
| HAAC | 11 | 6 | 17 |
| HBA | 5 | 5 | 10 |
| NHNAC | 4 | 5 | 9 |
| NHNA | 3 | 1 | 4 |
| HAA | 2 | 0 | 2 |
• Black Hawk County population
29.7 mi, 
22°
• Marshall County
23.3 mi, 
264°
• Jasper County
38.1 mi, 
225°
• Benton County
24.2 mi, 
87°
• Buchanan County
44.6 mi, 
52°
• Poweshiek County
27 mi, 
179°
• Hardin County
42.5 mi, 
300°
• Iowa County
36.3 mi, 
138°
• Butler County
47.3 mi, 
344°
• Grundy County
26.3 mi, 
329°
[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
See note 2 Iowa Notes
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