Last official estimated population of Linn County was 9,637 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Kansas state population. Area of Linn County is 606.4 mi² (=1570.6 km²), in this year population density was 15.89 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Linn County population in 2026 would be 9,580 [0].
Historical population of Linn 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] +6.75 %/yr
[1870-1880] +2.31 %/yr
[1880-1890] +1.19 %/yr
[1890-1900] -0.31 %/yr
[1900-1910] -1.24 %/yr
[1910-1920] -0.64 %/yr
[1920-1930] -0.21 %/yr
[1930-1940] -1.22 %/yr
[1940-1950] -1.73 %/yr
[1950-1960] -1.93 %/yr
[1960-1970] -0.63 %/yr
[1970-1980] +0.58 %/yr
[1980-1990] +0.02 %/yr
[1990-2000] +1.46 %/yr
[2000-2005] +1.01 %/yr
[2005-2010] -0.76 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Linn County? Visit this page: Settlements in Linn County, KS
Population of Linn County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 208 | 268 | 476 |
| 5 to 9 | 306 | 332 | 638 |
| 10 to 14 | 338 | 340 | 678 |
| 15 to 19 | 299 | 314 | 613 |
| 20 to 24 | 218 | 209 | 427 |
| 25 to 29 | 225 | 219 | 444 |
| 30 to 34 | 257 | 248 | 505 |
| 35 to 39 | 263 | 268 | 531 |
| 40 to 44 | 274 | 270 | 544 |
| 45 to 49 | 277 | 279 | 556 |
| 50 to 54 | 389 | 362 | 751 |
| 55 to 59 | 351 | 310 | 661 |
| 60 to 64 | 348 | 348 | 696 |
| 65 to 69 | 324 | 358 | 682 |
| 70 to 74 | 261 | 243 | 504 |
| 75 to 79 | 160 | 167 | 327 |
| 80 to 84 | 113 | 121 | 234 |
| 85+ | 96 | 139 | 235 |
Linn 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 | 4615 | 4700 | 9,315 |
| NH | 4596 | 4683 | 9,279 |
| WA | 4527 | 4623 | 9,150 |
| NHWAC | 4507 | 4596 | 9,103 |
| NHWA | 4420 | 4520 | 8,940 |
| H | 111 | 112 | 223 |
| HWAC | 108 | 104 | 212 |
| HWA | 107 | 103 | 210 |
| IAC | 94 | 92 | 186 |
| NHIAC | 92 | 86 | 178 |
| TOM | 93 | 80 | 173 |
| NHTOM | 91 | 78 | 169 |
| BAC | 63 | 51 | 114 |
| NHBAC | 60 | 48 | 108 |
| BA | 41 | 33 | 74 |
| NHBA | 39 | 30 | 69 |
| IA | 29 | 36 | 65 |
| NHIA | 29 | 32 | 61 |
| AAC | 26 | 29 | 55 |
| NHAAC | 25 | 29 | 54 |
| AA | 15 | 21 | 36 |
| NHAA | 15 | 21 | 36 |
| NAC | 7 | 3 | 10 |
| NHNAC | 7 | 2 | 9 |
| HIAC | 2 | 6 | 8 |
| HBAC | 3 | 3 | 6 |
| HBA | 2 | 3 | 5 |
| NA | 2 | 2 | 4 |
| NHNA | 2 | 2 | 4 |
| HTOM | 2 | 2 | 4 |
| HIA | 0 | 4 | 4 |
| HAAC | 1 | 0 | 1 |
| HNAC | 0 | 1 | 1 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Johnson County population
46.1 mi,
1°
• Cass County
39.9 mi,
41°
• Miami County
24.2 mi,
1°
• Franklin County
33.3 mi,
315°
• Vernon County
37.3 mi,
132°
• Bates County
27.6 mi,
84°
• Bourbon County
24.9 mi,
180°
• Allen County
33.8 mi,
227°
• Coffey County
48 mi,
271°
• Anderson County
24.3 mi,
269°
[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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