Last official estimated population of Hamilton County was 2,698 (year 2014)[1]. This was 0.001% of total US population and 0.1% of total Kansas state population. Area of Hamilton County is 997.6 mi² (=2583.9 km²), in this year population density was 2.70 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Hamilton County population in 2026 would be 2,722 [0].
Historical population of Hamilton County for period 1880-2014 [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

[1880-1890] +28.28 %/yr
[1890-1900] -3.46 %/yr
[1900-1910] +8.95 %/yr
[1910-1920] -2.58 %/yr
[1920-1930] +2.55 %/yr
[1930-1940] -2.27 %/yr
[1940-1950] +3.4 %/yr
[1950-1960] -1.6 %/yr
[1960-1970] -1.34 %/yr
[1970-1980] -0.88 %/yr
[1980-1990] -0.51 %/yr
[1990-2000] +1.1 %/yr
[2000-2005] -0.57 %/yr
[2005-2010] +0.76 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Hamilton County? Visit this page: Settlements in Hamilton County, KS
Population of Hamilton County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 119 | 100 | 219 |
| 5 to 9 | 129 | 91 | 220 |
| 10 to 14 | 116 | 104 | 220 |
| 15 to 19 | 86 | 81 | 167 |
| 20 to 24 | 78 | 70 | 148 |
| 25 to 29 | 76 | 89 | 165 |
| 30 to 34 | 80 | 93 | 173 |
| 35 to 39 | 94 | 76 | 170 |
| 40 to 44 | 75 | 75 | 150 |
| 45 to 49 | 75 | 66 | 141 |
| 50 to 54 | 107 | 103 | 210 |
| 55 to 59 | 79 | 82 | 161 |
| 60 to 64 | 75 | 73 | 148 |
| 65 to 69 | 54 | 46 | 100 |
| 70 to 74 | 39 | 40 | 79 |
| 75 to 79 | 27 | 23 | 50 |
| 80 to 84 | 22 | 29 | 51 |
| 85+ | 7 | 24 | 31 |
Hamilton 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 | 1284 | 1237 | 2,521 |
| WA | 1266 | 1216 | 2,482 |
| NH | 871 | 854 | 1,725 |
| NHWAC | 844 | 835 | 1,679 |
| NHWA | 830 | 819 | 1,649 |
| H | 467 | 411 | 878 |
| HWAC | 440 | 402 | 842 |
| HWA | 436 | 397 | 833 |
| IAC | 46 | 27 | 73 |
| IA | 33 | 17 | 50 |
| HIAC | 27 | 13 | 40 |
| TOM | 18 | 21 | 39 |
| NHIAC | 19 | 14 | 33 |
| HIA | 23 | 9 | 32 |
| NHTOM | 14 | 16 | 30 |
| BAC | 12 | 12 | 24 |
| NHBAC | 10 | 12 | 22 |
| NHIA | 10 | 8 | 18 |
| AAC | 6 | 9 | 15 |
| BA | 9 | 5 | 14 |
| NHAAC | 6 | 8 | 14 |
| NHBA | 7 | 5 | 12 |
| NHAA | 4 | 6 | 10 |
| AA | 4 | 6 | 10 |
| NAC | 8 | 1 | 9 |
| HTOM | 4 | 5 | 9 |
| NA | 8 | 0 | 8 |
| NHNAC | 6 | 1 | 7 |
| NHNA | 6 | 0 | 6 |
| HNAC | 2 | 0 | 2 |
| HBA | 2 | 0 | 2 |
| HBAC | 2 | 0 | 2 |
| HNA | 2 | 0 | 2 |
| HAAC | 0 | 1 | 1 |
| HAA | 0 | 0 | 0 |
• Finney County population
57.5 mi,
86°
• Prowers County
32.7 mi,
265°
• Grant County
41.1 mi,
138°
• Scott County
58.7 mi,
55°
• Haskell County
58.4 mi,
121°
• Kearny County
26.4 mi,
90°
• Morton County
56 mi,
180°
• Stanton County
29.7 mi,
179°
• Wichita County
41.4 mi,
35°
• Greeley County
33.5 mi,
358°
[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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