Last official estimated population of Worth County was 7,577 (year 2014)[1]. This was 0.002% of total US population and 0.2% of total Iowa state population. Area of Worth County is 401.9 mi² (=1041 km²), in this year population density was 18.85 p/mi². If population growth rate would be same as in period 2010-2014 (-0.07%/yr), Worth County population in 2024 would be 7,525 [0].
Historical population of Worth 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] +14.36 %/yr
[1870-1880] +10.65 %/yr
[1880-1890] +1.52 %/yr
[1890-1900] +1.65 %/yr
[1900-1910] -0.9 %/yr
[1910-1920] +1.57 %/yr
[1920-1930] -0.41 %/yr
[1930-1940] +0.25 %/yr
[1940-1950] -0.34 %/yr
[1950-1960] -0.76 %/yr
[1960-1970] -1.34 %/yr
[1970-1980] +0.12 %/yr
[1980-1990] -1.26 %/yr
[1990-2000] -0.11 %/yr
[2000-2005] -0.41 %/yr
[2005-2010] -0.37 %/yr
[2010-2014] -0.07 %/yr
Looking for settlements in Worth County? Visit this page: Settlements in Worth County, IA
Population of Worth County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 193 | 197 | 390 |
| 5 to 9 | 224 | 220 | 444 |
| 10 to 14 | 229 | 250 | 479 |
| 15 to 19 | 266 | 264 | 530 |
| 20 to 24 | 221 | 197 | 418 |
| 25 to 29 | 156 | 164 | 320 |
| 30 to 34 | 242 | 202 | 444 |
| 35 to 39 | 196 | 183 | 379 |
| 40 to 44 | 221 | 237 | 458 |
| 45 to 49 | 239 | 233 | 472 |
| 50 to 54 | 339 | 289 | 628 |
| 55 to 59 | 325 | 293 | 618 |
| 60 to 64 | 261 | 272 | 533 |
| 65 to 69 | 225 | 214 | 439 |
| 70 to 74 | 180 | 174 | 354 |
| 75 to 79 | 132 | 136 | 268 |
| 80 to 84 | 74 | 127 | 201 |
| 85+ | 76 | 173 | 249 |
Worth 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 | 3726 | 3757 | 7,483 |
| NH | 3683 | 3733 | 7,416 |
| WA | 3689 | 3726 | 7,415 |
| NHWAC | 3623 | 3678 | 7,301 |
| NHWA | 3588 | 3651 | 7,239 |
| H | 116 | 92 | 208 |
| HWAC | 103 | 79 | 182 |
| HWA | 101 | 75 | 176 |
| BAC | 54 | 47 | 101 |
| NHBAC | 49 | 39 | 88 |
| TOM | 38 | 35 | 73 |
| BA | 37 | 34 | 71 |
| NHTOM | 36 | 31 | 67 |
| AAC | 28 | 33 | 61 |
| NHBA | 32 | 27 | 59 |
| NHAAC | 27 | 31 | 58 |
| IAC | 30 | 22 | 52 |
| AA | 20 | 20 | 40 |
| NHAA | 19 | 19 | 38 |
| NHIAC | 21 | 15 | 36 |
| IA | 15 | 9 | 24 |
| HIAC | 9 | 7 | 16 |
| HBAC | 5 | 8 | 13 |
| NHIA | 8 | 4 | 12 |
| HIA | 7 | 5 | 12 |
| HBA | 5 | 7 | 12 |
| HTOM | 2 | 4 | 6 |
| NAC | 1 | 2 | 3 |
| NHNAC | 1 | 2 | 3 |
| HAAC | 1 | 2 | 3 |
| HAA | 1 | 1 | 2 |
| NA | 0 | 1 | 1 |
| NHNA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Cerro Gordo County population
20.6 mi, 
180°
• Mower County
31.8 mi, 
50°
• Steele County
44.4 mi, 
1°
• Freeborn County
21.4 mi, 
346°
• Floyd County
32.1 mi, 
133°
• Faribault County
40.8 mi, 
300°
• Hancock County
32.3 mi, 
230°
• Winnebago County
24.9 mi, 
270°
• Mitchell County
23.4 mi, 
94°
• Franklin County
44 mi, 181°
[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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